diff --git a/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/CdcTools.java b/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/CdcTools.java
index 9caddd2ba..77d9d847e 100644
--- a/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/CdcTools.java
+++ b/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/CdcTools.java
@@ -20,6 +20,7 @@
 import org.apache.flink.api.java.utils.MultipleParameterTool;
 import org.apache.flink.configuration.Configuration;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.util.Preconditions;
 import org.apache.flink.util.StringUtils;
 
 import org.apache.doris.flink.tools.cdc.mysql.MysqlDatabaseSync;
@@ -42,9 +43,9 @@ public class CdcTools {
     private static final List<String> EMPTY_KEYS = Collections.singletonList("password");
 
     public static void main(String[] args) throws Exception {
+        System.out.println("Input args: " + Arrays.asList(args) + ".\n");
         String operation = args[0].toLowerCase();
         String[] opArgs = Arrays.copyOfRange(args, 1, args.length);
-        System.out.println();
         switch (operation) {
             case MYSQL_SYNC_DATABASE:
                 createMySQLSyncDatabase(opArgs);
@@ -66,6 +67,7 @@ public static void main(String[] args) throws Exception {
 
     private static void createMySQLSyncDatabase(String[] opArgs) throws Exception {
         MultipleParameterTool params = MultipleParameterTool.fromArgs(opArgs);
+        Preconditions.checkArgument(params.has("mysql-conf"));
         Map<String, String> mysqlMap = getConfigMap(params, "mysql-conf");
         Configuration mysqlConfig = Configuration.fromMap(mysqlMap);
         DatabaseSync databaseSync = new MysqlDatabaseSync();
@@ -74,6 +76,7 @@ private static void createMySQLSyncDatabase(String[] opArgs) throws Exception {
 
     private static void createOracleSyncDatabase(String[] opArgs) throws Exception {
         MultipleParameterTool params = MultipleParameterTool.fromArgs(opArgs);
+        Preconditions.checkArgument(params.has("oracle-conf"));
         Map<String, String> oracleMap = getConfigMap(params, "oracle-conf");
         Configuration oracleConfig = Configuration.fromMap(oracleMap);
         DatabaseSync databaseSync = new OracleDatabaseSync();
@@ -82,6 +85,7 @@ private static void createOracleSyncDatabase(String[] opArgs) throws Exception {
 
     private static void createPostgresSyncDatabase(String[] opArgs) throws Exception {
         MultipleParameterTool params = MultipleParameterTool.fromArgs(opArgs);
+        Preconditions.checkArgument(params.has("postgres-conf"));
         Map<String, String> postgresMap = getConfigMap(params, "postgres-conf");
         Configuration postgresConfig = Configuration.fromMap(postgresMap);
         DatabaseSync databaseSync = new PostgresDatabaseSync();
@@ -90,6 +94,7 @@ private static void createPostgresSyncDatabase(String[] opArgs) throws Exception
 
     private static void createSqlServerSyncDatabase(String[] opArgs) throws Exception {
         MultipleParameterTool params = MultipleParameterTool.fromArgs(opArgs);
+        Preconditions.checkArgument(params.has("sqlserver-conf"));
         Map<String, String> postgresMap = getConfigMap(params, "sqlserver-conf");
         Configuration postgresConfig = Configuration.fromMap(postgresMap);
         DatabaseSync databaseSync = new SqlServerDatabaseSync();
@@ -115,6 +120,7 @@ private static void syncDatabase(
         boolean useNewSchemaChange = params.has("use-new-schema-change");
         boolean singleSink = params.has("single-sink");
 
+        Preconditions.checkArgument(params.has("sink-conf"));
         Map<String, String> sinkMap = getConfigMap(params, "sink-conf");
         Map<String, String> tableMap = getConfigMap(params, "table-conf");
         Configuration sinkConfig = Configuration.fromMap(sinkMap);
@@ -149,7 +155,8 @@ private static void syncDatabase(
 
     private static Map<String, String> getConfigMap(MultipleParameterTool params, String key) {
         if (!params.has(key)) {
-            return new HashMap<>();
+            System.out.println("Can not find key [" + key + "] from args: " + params.toMap().toString() + ".\n");
+            return null;
         }
 
         Map<String, String> map = new HashMap<>();
@@ -163,7 +170,8 @@ private static Map<String, String> getConfigMap(MultipleParameterTool params, St
                 continue;
             }
 
-            System.err.println("Invalid " + key + " " + param + ".\n");
+            System.out.println("Invalid " + key + " " + param + ".\n");
+            return null;
         }
         return map;
     }
diff --git a/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/DatabaseSync.java b/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/DatabaseSync.java
index f1e172b11..cd31282e6 100644
--- a/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/DatabaseSync.java
+++ b/flink-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/DatabaseSync.java
@@ -22,6 +22,7 @@
 import org.apache.flink.streaming.api.datastream.DataStreamSource;
 import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.util.CollectionUtil;
 import org.apache.flink.util.OutputTag;
 import org.apache.flink.util.Preconditions;
 import org.apache.flink.util.StringUtils;
@@ -441,7 +442,9 @@ public DatabaseSync setMultiToOneTarget(String multiToOneTarget) {
     }
 
     public DatabaseSync setTableConfig(Map<String, String> tableConfig) {
-        this.tableConfig = tableConfig;
+        if(!CollectionUtil.isNullOrEmpty(tableConfig)){
+            this.tableConfig = tableConfig;
+        }
         return this;
     }