flink/src/test/java/org/apache/iceberg/flink/MiniClusterResource.java

/*
 * 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.
 */

package org.apache.iceberg.flink;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.CoreOptions;
import org.apache.flink.runtime.testutils.MiniClusterResourceConfiguration;
import org.apache.flink.test.util.MiniClusterWithClientResource;

public class MiniClusterResource {

  private static final int DEFAULT_TM_NUM = 1;
  private static final int DEFAULT_PARALLELISM = 4;

  public static final Configuration DISABLE_CLASSLOADER_CHECK_CONFIG = new Configuration()
      // disable classloader check as Avro may cache class/object in the serializers.
      .set(CoreOptions.CHECK_LEAKED_CLASSLOADER, false);

  private MiniClusterResource() {

  }

  /**
   * It will start a mini cluster with classloader.check-leaked-classloader=false,
   * so that we won't break the unit tests because of the class loader leak issue.
   * In our iceberg integration tests, there're some that will assert the results
   * after finished the flink jobs, so actually we may access the class loader
   * that has been closed by the flink task managers if we enable the switch
   * classloader.check-leaked-classloader by default.
   */
  public static MiniClusterWithClientResource createWithClassloaderCheckDisabled() {
    return new MiniClusterWithClientResource(
        new MiniClusterResourceConfiguration.Builder()
            .setNumberTaskManagers(DEFAULT_TM_NUM)
            .setNumberSlotsPerTaskManager(DEFAULT_PARALLELISM)
            .setConfiguration(DISABLE_CLASSLOADER_CHECK_CONFIG)
            .build());
  }

}