diff --git a/LICENSE b/LICENSE
index 7f77f44e..0759eeaf 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2017-2020 the original author or authors
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/pom.xml b/pom.xml
index f28e100d..e76f51d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,12 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one or more
-  ~ contributor license agreements.  See the NOTICE file distributed with
-  ~ this work for additional information regarding copyright ownership.
-  ~ The ASF licenses this file to You under the Apache License, Version 2.0
-  ~ (the "License"); you may not use this file except in compliance with
-  ~ the License.  You may obtain a copy of the License at
+  ~ Copyright 2017-2020 the original author or authors.
+
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
   ~
   ~     http://www.apache.org/licenses/LICENSE-2.0
   ~
diff --git a/src/main/java/io/openmessaging/storage/dledger/AppendFuture.java b/src/main/java/io/openmessaging/storage/dledger/AppendFuture.java
index 66ba6520..8527c17e 100644
--- a/src/main/java/io/openmessaging/storage/dledger/AppendFuture.java
+++ b/src/main/java/io/openmessaging/storage/dledger/AppendFuture.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/BatchAppendFuture.java b/src/main/java/io/openmessaging/storage/dledger/BatchAppendFuture.java
index 0b36edee..28b76309 100644
--- a/src/main/java/io/openmessaging/storage/dledger/BatchAppendFuture.java
+++ b/src/main/java/io/openmessaging/storage/dledger/BatchAppendFuture.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedger.java b/src/main/java/io/openmessaging/storage/dledger/DLedger.java
index 90111110..1bcad82a 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedger.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedger.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerConfig.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerConfig.java
index 54d87eb5..57b59bbb 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerConfig.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerConfig.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerEntryPusher.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerEntryPusher.java
index 32d3b9ae..1bc04bc6 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerEntryPusher.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerEntryPusher.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerLeaderElector.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerLeaderElector.java
index 49f8649f..e6048051 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerLeaderElector.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerLeaderElector.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcNettyService.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcNettyService.java
index 9257c9a0..7121c120 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcNettyService.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcNettyService.java
@@ -1,17 +1,16 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language dgoverning permissions and
+ * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcService.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcService.java
index 9831c616..3489e34f 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcService.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerRpcService.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/DLedgerServer.java b/src/main/java/io/openmessaging/storage/dledger/DLedgerServer.java
index bad781a6..6a645587 100644
--- a/src/main/java/io/openmessaging/storage/dledger/DLedgerServer.java
+++ b/src/main/java/io/openmessaging/storage/dledger/DLedgerServer.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/MemberState.java b/src/main/java/io/openmessaging/storage/dledger/MemberState.java
index 3b1bfb26..4f229715 100644
--- a/src/main/java/io/openmessaging/storage/dledger/MemberState.java
+++ b/src/main/java/io/openmessaging/storage/dledger/MemberState.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/ShutdownAbleThread.java b/src/main/java/io/openmessaging/storage/dledger/ShutdownAbleThread.java
index 6d79b215..804c1de6 100644
--- a/src/main/java/io/openmessaging/storage/dledger/ShutdownAbleThread.java
+++ b/src/main/java/io/openmessaging/storage/dledger/ShutdownAbleThread.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/TimeoutFuture.java b/src/main/java/io/openmessaging/storage/dledger/TimeoutFuture.java
index 8a89cf14..f0332b71 100644
--- a/src/main/java/io/openmessaging/storage/dledger/TimeoutFuture.java
+++ b/src/main/java/io/openmessaging/storage/dledger/TimeoutFuture.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClient.java b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClient.java
index 20f7371b..fd1afd55 100644
--- a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClient.java
+++ b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClient.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcNettyService.java b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcNettyService.java
index 06333d5c..ba91d271 100644
--- a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcNettyService.java
+++ b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcNettyService.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcService.java b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcService.java
index 504e589a..9bb542e1 100644
--- a/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcService.java
+++ b/src/main/java/io/openmessaging/storage/dledger/client/DLedgerClientRpcService.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/AppendCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/AppendCommand.java
index e8c54543..a971962f 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/AppendCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/AppendCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/BaseCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/BaseCommand.java
index 35e90c99..ea99bd01 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/BaseCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/BaseCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/BossCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/BossCommand.java
index d372ea3f..9ed06f4f 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/BossCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/BossCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/GetCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/GetCommand.java
index 93ab1653..15f3c8bf 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/GetCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/GetCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/LeadershipTransferCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/LeadershipTransferCommand.java
index a84ea220..e76afe31 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/LeadershipTransferCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/LeadershipTransferCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/cmdline/ReadFileCommand.java b/src/main/java/io/openmessaging/storage/dledger/cmdline/ReadFileCommand.java
index c435d883..dec42797 100644
--- a/src/main/java/io/openmessaging/storage/dledger/cmdline/ReadFileCommand.java
+++ b/src/main/java/io/openmessaging/storage/dledger/cmdline/ReadFileCommand.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntry.java b/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntry.java
index afc075a3..a8ad96d4 100644
--- a/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntry.java
+++ b/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntry.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoder.java b/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoder.java
index ace490da..ae9d64c5 100644
--- a/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoder.java
+++ b/src/main/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoder.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/exception/DLedgerException.java b/src/main/java/io/openmessaging/storage/dledger/exception/DLedgerException.java
index 23c83d94..42baee65 100644
--- a/src/main/java/io/openmessaging/storage/dledger/exception/DLedgerException.java
+++ b/src/main/java/io/openmessaging/storage/dledger/exception/DLedgerException.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryRequest.java
index 556716e6..8af7b574 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryResponse.java
index 44d22b7d..4d157736 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/AppendEntryResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/BatchAppendEntryRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/BatchAppendEntryRequest.java
index de0a629d..61655d7a 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/BatchAppendEntryRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/BatchAppendEntryRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocol.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocol.java
index dfb96bb4..0e21114e 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocol.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocol.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocolHandler.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocolHandler.java
index e6be7707..22410a23 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocolHandler.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerClientProtocolHandler.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocol.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocol.java
index 6ad29c1b..71e2a9f4 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocol.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocol.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocolHander.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocolHander.java
index f0ada419..79bd5632 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocolHander.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerProtocolHander.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerRequestCode.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerRequestCode.java
index 0c1655db..f875c3c8 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerRequestCode.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerRequestCode.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerResponseCode.java b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerResponseCode.java
index 1d98d7d6..e37283e9 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerResponseCode.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/DLedgerResponseCode.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesRequest.java
index 38a9d9d1..d85ea604 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesResponse.java
index 1d5e1c7e..9ad7b6e8 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/GetEntriesResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatRequest.java
index 4b867179..b4a8e00e 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatResponse.java
index d9d9878b..642e4ea5 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/HeartBeatResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferRequest.java
index f916eecb..74f572e1 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferResponse.java
index 06776b78..f2cc0052 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/LeadershipTransferResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataRequest.java
index 1b2e2f7a..4a7db38d 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataResponse.java
index e595811d..5cc0b786 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/MetadataResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesRequest.java
index 23c032e1..a9b19e78 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesResponse.java
index d56616c5..84b55bf6 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/PullEntriesResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryRequest.java
index 66874fff..aa7b25b1 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryResponse.java
index 39be9715..99755045 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/PushEntryResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/RequestOrResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/RequestOrResponse.java
index d8bf5284..8f3eca3e 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/RequestOrResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/RequestOrResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/VoteRequest.java b/src/main/java/io/openmessaging/storage/dledger/protocol/VoteRequest.java
index daf946af..85b49258 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/VoteRequest.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/VoteRequest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/protocol/VoteResponse.java b/src/main/java/io/openmessaging/storage/dledger/protocol/VoteResponse.java
index c7cb4e8f..9e2cdacb 100644
--- a/src/main/java/io/openmessaging/storage/dledger/protocol/VoteResponse.java
+++ b/src/main/java/io/openmessaging/storage/dledger/protocol/VoteResponse.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/DLedgerMemoryStore.java b/src/main/java/io/openmessaging/storage/dledger/store/DLedgerMemoryStore.java
index c8a16b0f..969b5a65 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/DLedgerMemoryStore.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/DLedgerMemoryStore.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/DLedgerStore.java b/src/main/java/io/openmessaging/storage/dledger/store/DLedgerStore.java
index 6b4213f7..8bb36cb7 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/DLedgerStore.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/DLedgerStore.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/DLedgerMmapFileStore.java b/src/main/java/io/openmessaging/storage/dledger/store/file/DLedgerMmapFileStore.java
index 8b9783bd..cc8aa763 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/DLedgerMmapFileStore.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/DLedgerMmapFileStore.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/DefaultMmapFile.java b/src/main/java/io/openmessaging/storage/dledger/store/file/DefaultMmapFile.java
index f95210a3..c4a8fcbe 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/DefaultMmapFile.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/DefaultMmapFile.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFile.java b/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFile.java
index 4a9ef6d7..5dc517a7 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFile.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFile.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFileList.java b/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFileList.java
index 378983e2..a003ac7b 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFileList.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/MmapFileList.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/ReferenceResource.java b/src/main/java/io/openmessaging/storage/dledger/store/file/ReferenceResource.java
index cbd812d0..5adeb7dd 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/ReferenceResource.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/ReferenceResource.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/store/file/SelectMmapBufferResult.java b/src/main/java/io/openmessaging/storage/dledger/store/file/SelectMmapBufferResult.java
index 39521265..cbaf42a3 100644
--- a/src/main/java/io/openmessaging/storage/dledger/store/file/SelectMmapBufferResult.java
+++ b/src/main/java/io/openmessaging/storage/dledger/store/file/SelectMmapBufferResult.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/DLedgerUtils.java b/src/main/java/io/openmessaging/storage/dledger/utils/DLedgerUtils.java
index 899f1537..6fdec881 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/DLedgerUtils.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/DLedgerUtils.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/IOUtils.java b/src/main/java/io/openmessaging/storage/dledger/utils/IOUtils.java
index a2e3a337..d8f6cdbc 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/IOUtils.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/IOUtils.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/Pair.java b/src/main/java/io/openmessaging/storage/dledger/utils/Pair.java
index 9958442d..07a89791 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/Pair.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/Pair.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/PreConditions.java b/src/main/java/io/openmessaging/storage/dledger/utils/PreConditions.java
index 92fb83bc..bd93e719 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/PreConditions.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/PreConditions.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/Quota.java b/src/main/java/io/openmessaging/storage/dledger/utils/Quota.java
index f521080a..31792282 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/Quota.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/Quota.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/java/io/openmessaging/storage/dledger/utils/ResettableCountDownLatch.java b/src/main/java/io/openmessaging/storage/dledger/utils/ResettableCountDownLatch.java
index b1f6aa1a..c4fd5f38 100644
--- a/src/main/java/io/openmessaging/storage/dledger/utils/ResettableCountDownLatch.java
+++ b/src/main/java/io/openmessaging/storage/dledger/utils/ResettableCountDownLatch.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/main/resources/log4j.properties b/src/main/resources/log4j.properties
index 6c8696fd..abce624d 100644
--- a/src/main/resources/log4j.properties
+++ b/src/main/resources/log4j.properties
@@ -1,9 +1,8 @@
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# Copyright 2017-2020 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
diff --git a/src/test/java/io/openmessaging/storage/dledger/AppendAndGetTest.java b/src/test/java/io/openmessaging/storage/dledger/AppendAndGetTest.java
index 4246ca0a..4450484d 100644
--- a/src/test/java/io/openmessaging/storage/dledger/AppendAndGetTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/AppendAndGetTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/AppendAndPushTest.java b/src/test/java/io/openmessaging/storage/dledger/AppendAndPushTest.java
index eef0674c..27677e52 100644
--- a/src/test/java/io/openmessaging/storage/dledger/AppendAndPushTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/AppendAndPushTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/BatchPushTest.java b/src/test/java/io/openmessaging/storage/dledger/BatchPushTest.java
index 114ca500..81ba8982 100644
--- a/src/test/java/io/openmessaging/storage/dledger/BatchPushTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/BatchPushTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/DLedgerConfigTest.java b/src/test/java/io/openmessaging/storage/dledger/DLedgerConfigTest.java
index 62a6bcd6..926daba4 100644
--- a/src/test/java/io/openmessaging/storage/dledger/DLedgerConfigTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/DLedgerConfigTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/LeaderElectorTest.java b/src/test/java/io/openmessaging/storage/dledger/LeaderElectorTest.java
index 6542905f..a1682aa8 100644
--- a/src/test/java/io/openmessaging/storage/dledger/LeaderElectorTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/LeaderElectorTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/ServerTestBase.java b/src/test/java/io/openmessaging/storage/dledger/ServerTestBase.java
index f60bb8be..92f22c78 100644
--- a/src/test/java/io/openmessaging/storage/dledger/ServerTestBase.java
+++ b/src/test/java/io/openmessaging/storage/dledger/ServerTestBase.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/ServerTestHarness.java b/src/test/java/io/openmessaging/storage/dledger/ServerTestHarness.java
index e69a5f4f..5a7b6913 100644
--- a/src/test/java/io/openmessaging/storage/dledger/ServerTestHarness.java
+++ b/src/test/java/io/openmessaging/storage/dledger/ServerTestHarness.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoderTest.java b/src/test/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoderTest.java
index 5eafce84..96e1c53e 100644
--- a/src/test/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoderTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/entry/DLedgerEntryCoderTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/protocol/HeartbeatRequestTest.java b/src/test/java/io/openmessaging/storage/dledger/protocol/HeartbeatRequestTest.java
index 7c43f0f9..1f20068d 100644
--- a/src/test/java/io/openmessaging/storage/dledger/protocol/HeartbeatRequestTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/protocol/HeartbeatRequestTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/protocol/VoteRequestTest.java b/src/test/java/io/openmessaging/storage/dledger/protocol/VoteRequestTest.java
index 55a612ad..c7219ed9 100644
--- a/src/test/java/io/openmessaging/storage/dledger/protocol/VoteRequestTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/protocol/VoteRequestTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/store/DLedgerMappedFileStoreTest.java b/src/test/java/io/openmessaging/storage/dledger/store/DLedgerMappedFileStoreTest.java
index 44072c77..77928eb1 100644
--- a/src/test/java/io/openmessaging/storage/dledger/store/DLedgerMappedFileStoreTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/store/DLedgerMappedFileStoreTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/store/MmapFileListTest.java b/src/test/java/io/openmessaging/storage/dledger/store/MmapFileListTest.java
index a6cac621..ff0c7f73 100644
--- a/src/test/java/io/openmessaging/storage/dledger/store/MmapFileListTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/store/MmapFileListTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/util/FileTestUtil.java b/src/test/java/io/openmessaging/storage/dledger/util/FileTestUtil.java
index cfa243b1..fbffc711 100644
--- a/src/test/java/io/openmessaging/storage/dledger/util/FileTestUtil.java
+++ b/src/test/java/io/openmessaging/storage/dledger/util/FileTestUtil.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/java/io/openmessaging/storage/dledger/util/QuotaTest.java b/src/test/java/io/openmessaging/storage/dledger/util/QuotaTest.java
index 8ea4e8e5..9d121ce3 100644
--- a/src/test/java/io/openmessaging/storage/dledger/util/QuotaTest.java
+++ b/src/test/java/io/openmessaging/storage/dledger/util/QuotaTest.java
@@ -1,12 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
+ * Copyright 2017-2020 the original author or authors.
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/src/test/resources/log4j.properties b/src/test/resources/log4j.properties
index 8f14d500..64589428 100644
--- a/src/test/resources/log4j.properties
+++ b/src/test/resources/log4j.properties
@@ -1,9 +1,8 @@
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# Copyright 2017-2020 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
diff --git a/style/copyright/Apache.xml b/style/copyright/Apache.xml
index 8b112eea..f391974d 100644
--- a/style/copyright/Apache.xml
+++ b/style/copyright/Apache.xml
@@ -1,10 +1,9 @@
 <!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one or more
-  ~ contributor license agreements.  See the NOTICE file distributed with
-  ~ this work for additional information regarding copyright ownership.
-  ~ The ASF licenses this file to You under the Apache License, Version 2.0
-  ~ (the "License"); you may not use this file except in compliance with
-  ~ the License.  You may obtain a copy of the License at
+  ~ Copyright 2017-2020 the original author or authors.
+
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
   ~
   ~     http://www.apache.org/licenses/LICENSE-2.0
   ~
@@ -19,6 +18,6 @@
     <copyright>
         <option name="myName" value="Apache"/>
         <option name="notice"
-                value="Licensed to the Apache Software Foundation (ASF) under one or more&#10;contributor license agreements.  See the NOTICE file distributed with&#10;this work for additional information regarding copyright ownership.&#10;The ASF licenses this file to You under the Apache License, Version 2.0&#10;(the &quot;License&quot;); you may not use this file except in compliance with&#10;the License.  You may obtain a copy of the License at&#10;&#10;    http://www.apache.org/licenses/LICENSE-2.0&#10;&#10;Unless required by applicable law or agreed to in writing, software&#10;distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;See the License for the specific language governing permissions and&#10;limitations under the License."/>
+                value="Copyright 2017-2020 the original author or authors&#10;&#10;Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);&#10;you may not use this file except in compliance with the License.&#10;You may obtain a copy of the License at&#10;&#10;    http://www.apache.org/licenses/LICENSE-2.0&#10;&#10;Unless required by applicable law or agreed to in writing, software&#10;distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;See the License for the specific language governing permissions and&#10;limitations under the License."/>
     </copyright>
 </component>
\ No newline at end of file
diff --git a/style/copyright/profiles_settings.xml b/style/copyright/profiles_settings.xml
index d719db10..e00225e8 100644
--- a/style/copyright/profiles_settings.xml
+++ b/style/copyright/profiles_settings.xml
@@ -1,10 +1,9 @@
 <!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one or more
-  ~ contributor license agreements.  See the NOTICE file distributed with
-  ~ this work for additional information regarding copyright ownership.
-  ~ The ASF licenses this file to You under the Apache License, Version 2.0
-  ~ (the "License"); you may not use this file except in compliance with
-  ~ the License.  You may obtain a copy of the License at
+  ~ Copyright 2017-2020 the original author or authors.
+
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
   ~
   ~     http://www.apache.org/licenses/LICENSE-2.0
   ~
diff --git a/style/dledger_checkstyle.xml b/style/dledger_checkstyle.xml
index 5dd25154..cfdcef89 100644
--- a/style/dledger_checkstyle.xml
+++ b/style/dledger_checkstyle.xml
@@ -1,11 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one or more
-  ~ contributor license agreements.  See the NOTICE file distributed with
-  ~ this work for additional information regarding copyright ownership.
-  ~ The ASF licenses this file to You under the Apache License, Version 2.0
-  ~ (the "License"); you may not use this file except in compliance with
-  ~ the License.  You may obtain a copy of the License at
+  ~ Copyright 2017-2020 the original author or authors.
+
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
   ~
   ~     http://www.apache.org/licenses/LICENSE-2.0
   ~
@@ -29,12 +28,12 @@
 
     <!-- header -->
     <module name="RegexpHeader">
-        <property name="header" value="/\*\nLicensed to the Apache Software Foundation*"/>
+        <property name="header" value="/\*\nCopyright 2017-2020 the original author or authors*"/>
         <property name="fileExtensions" value="java"/>
     </module>
 
     <module name="RegexpHeader">
-        <property name="header" value="#[\s]*Licensed to the Apache Software Foundation*"/>
+        <property name="header" value="#[\s]*Copyright 2017-2020 the original author or authors.*"/>
         <property name="fileExtensions" value="properties"/>
     </module>
 
diff --git a/style/dledger_codestyle.xml b/style/dledger_codestyle.xml
index cdd6b205..84b91d28 100644
--- a/style/dledger_codestyle.xml
+++ b/style/dledger_codestyle.xml
@@ -1,10 +1,9 @@
 <!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one or more
-  ~ contributor license agreements.  See the NOTICE file distributed with
-  ~ this work for additional information regarding copyright ownership.
-  ~ The ASF licenses this file to You under the Apache License, Version 2.0
-  ~ (the "License"); you may not use this file except in compliance with
-  ~ the License.  You may obtain a copy of the License at
+  ~ Copyright 2017-2020 the original author or authors.
+
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
   ~
   ~     http://www.apache.org/licenses/LICENSE-2.0
   ~