azagrebin commented on a change in pull request #7880: [FLINK-11336][zk] Delete ZNodes when ZooKeeperHaServices#closeAndCleanupAllData URL: https://github.com/apache/flink/pull/7880#discussion_r262164377
########## File path: flink-runtime/src/test/java/org/apache/flink/runtime/highavailability/zookeeper/ZooKeeperHaServicesTest.java ########## @@ -0,0 +1,250 @@ +/* + * 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.flink.runtime.highavailability.zookeeper; + +import org.apache.flink.api.common.JobID; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.HighAvailabilityOptions; +import org.apache.flink.runtime.blob.BlobKey; +import org.apache.flink.runtime.blob.BlobStoreService; +import org.apache.flink.runtime.concurrent.Executors; +import org.apache.flink.runtime.highavailability.RunningJobsRegistry; +import org.apache.flink.runtime.leaderelection.LeaderElectionService; +import org.apache.flink.runtime.leaderelection.TestingContender; +import org.apache.flink.runtime.leaderelection.TestingListener; +import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalService; +import org.apache.flink.runtime.util.ZooKeeperUtils; +import org.apache.flink.runtime.zookeeper.ZooKeeperResource; +import org.apache.flink.util.TestLogger; +import org.apache.flink.util.function.ThrowingConsumer; + +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.framework.CuratorFrameworkFactory; +import org.apache.curator.retry.RetryForever; +import org.junit.AfterClass; +import org.junit.Before; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; + +import javax.annotation.Nonnull; + +import java.io.File; +import java.io.IOException; +import java.util.List; + +import static org.hamcrest.Matchers.empty; +import static org.hamcrest.Matchers.equalTo; +import static org.hamcrest.Matchers.is; +import static org.hamcrest.Matchers.not; +import static org.hamcrest.Matchers.notNullValue; +import static org.hamcrest.Matchers.nullValue; +import static org.junit.Assert.assertThat; + +/** + * Tests for the {@link ZooKeeperHaServices}. + */ +public class ZooKeeperHaServicesTest extends TestLogger { + + @ClassRule + public static final ZooKeeperResource ZOO_KEEPER_RESOURCE = new ZooKeeperResource(); + + private static CuratorFramework client; + + @BeforeClass + public static void setupClass() { + client = startCuratorFramework(); + client.start(); + } + + @Before + public void setup() throws Exception { + final List<String> children = client.getChildren().forPath("/"); + + for (String child : children) { + if (!child.equals("zookeeper")) { + client.delete().deletingChildrenIfNeeded().forPath('/' + child); + } + } + } + + @AfterClass + public static void teardownClass() { + if (client != null) { + client.close(); + } + } + + /** + * Tests that a simple {@link ZooKeeperHaServices#close()} does not delete ZooKeeper paths. + */ + @Test + public void testSimpleClose() throws Exception { + final String rootPath = "/foo/bar/flink"; + final Configuration configuration = createConfiguration(rootPath); + + final TestingBlobStoreService blobStoreService = new TestingBlobStoreService(); + + runCleanupTest( + configuration, + blobStoreService, + ZooKeeperHaServices::close); + + assertThat(blobStoreService.isClosed(), is(true)); + assertThat(blobStoreService.isClosedAndCleanedUpAllData(), is(false)); + + final List<String> children = client.getChildren().forPath(rootPath); + assertThat(children, is(not(empty()))); + } + + /** + * Tests that the {@link ZooKeeperHaServices} cleans up all paths if + * it is closed via {@link ZooKeeperHaServices#closeAndCleanupAllData()}. + */ + @Test + public void testSimpleCloseAndCleanupAllData() throws Exception { + final Configuration configuration = createConfiguration("/foo/bar/flink"); + + final TestingBlobStoreService blobStoreService = new TestingBlobStoreService(); + + final List<String> initialChildren = client.getChildren().forPath("/"); + + runCleanupTest( + configuration, + blobStoreService, + ZooKeeperHaServices::closeAndCleanupAllData); + + assertThat(blobStoreService.isClosedAndCleanedUpAllData(), is(true)); + + final List<String> children = client.getChildren().forPath("/"); + assertThat(children, is(equalTo(initialChildren))); + } + + /** + * Tests that we can only delete the parent znodes as long as they are empty. + */ + @Test + public void testCloseAndCleanupAllDataWithUncle() throws Exception { + final String prefix = "/foo/bar"; + final String flinkPath = prefix + "/flink"; + final Configuration configuration = createConfiguration(flinkPath); + + final TestingBlobStoreService blobStoreService = new TestingBlobStoreService(); + + final String unclePath = prefix + "/foobar"; + client.create().creatingParentContainersIfNeeded().forPath(unclePath); + + runCleanupTest( + configuration, + blobStoreService, + ZooKeeperHaServices::closeAndCleanupAllData); + + assertThat(blobStoreService.isClosedAndCleanedUpAllData(), is(true)); + + assertThat(client.checkExists().forPath(flinkPath), is(nullValue())); + assertThat(client.checkExists().forPath(unclePath), is(notNullValue())); + } + + private static CuratorFramework startCuratorFramework() { + return CuratorFrameworkFactory.builder() + .connectString(ZOO_KEEPER_RESOURCE.getConnectString()) + .retryPolicy(new RetryForever(100)) Review comment: should we not rather fail fast after N retries? would it hang the test? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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