[core] Use java11 as default

.github/workflows/check-licensing.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Set JDK
         uses: actions/setup-java@v2
         with:
-          java-version: 8
+          java-version: 11
           distribution: 'adopt'
       - name: Build
         run: |

.github/workflows/utitcase-flink-jdk11.yml

@@ -1,62 +0,0 @@
-################################################################################
-#  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
-#
-#      http://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 governing permissions and
-# limitations under the License.
-################################################################################
-
-name: UTCase and ITCase Flink on JDK 11
-
-on:
-  issue_comment:
-    types: [created, edited, deleted]
-
-  # daily run
-  schedule:
-    - cron: "0 0 * * *"
-
-env:
-  JDK_VERSION: 11
-
-jobs:
-  build:
-    if: |
-      github.event_name == 'schedule' ||
-      (contains(github.event.comment.html_url, '/pull/') && contains(github.event.comment.body, '/jdk11'))
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-      - name: Set up JDK ${{ env.JDK_VERSION }}
-        uses: actions/setup-java@v2
-        with:
-          java-version: ${{ env.JDK_VERSION }}
-          distribution: 'adopt'
-      - name: Build Flink
-        run:  mvn -T 1C -B clean install -DskipTests
-      - name: Test Flink
-        run: |
-          # run tests with random timezone to find out timezone related bugs
-          . .github/workflows/utils.sh
-          jvm_timezone=$(random_timezone)
-          echo "JVM timezone is set to $jvm_timezone"
-          test_modules=""
-          for suffix in 1.15 1.16 1.17 1.18 1.19 1.20 common; do
-          test_modules+="org.apache.paimon:paimon-flink-${suffix},"
-          done
-          test_modules="${test_modules%,}"
-          mvn -T 1C -B clean install -pl "${test_modules}" -Duser.timezone=$jvm_timezone
-        env:
-          MAVEN_OPTS: -Xmx4096m

.github/workflows/utitcase-flink.yml

@@ -25,7 +25,7 @@ on:
       - '**/*.md'
 
 env:
-  JDK_VERSION: 8
+  JDK_VERSION: 11
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.number || github.run_id }}

.github/workflows/utitcase.yml

@@ -26,7 +26,7 @@ on:
       - '**/*.md'
 
 env:
-  JDK_VERSION: 8
+  JDK_VERSION: 11
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.number || github.run_id }}