tillrohrmann commented on a change in pull request #9832: [FLINK-11843] Bind lifespan of Dispatcher to leader session URL: https://github.com/apache/flink/pull/9832#discussion_r337413099
########## File path: flink-runtime/src/test/java/org/apache/flink/runtime/dispatcher/runner/SessionDispatcherLeaderProcessTest.java ########## @@ -0,0 +1,517 @@ +/* + * 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.dispatcher.runner; + +import org.apache.flink.api.common.JobID; +import org.apache.flink.core.testutils.OneShotLatch; +import org.apache.flink.runtime.client.DuplicateJobSubmissionException; +import org.apache.flink.runtime.client.JobSubmissionException; +import org.apache.flink.runtime.concurrent.FutureUtils; +import org.apache.flink.runtime.jobgraph.JobGraph; +import org.apache.flink.runtime.jobmanager.JobGraphStore; +import org.apache.flink.runtime.messages.Acknowledge; +import org.apache.flink.runtime.testutils.TestingJobGraphStore; +import org.apache.flink.runtime.util.TestingFatalErrorHandler; +import org.apache.flink.runtime.webmonitor.TestingDispatcherGateway; +import org.apache.flink.util.ExceptionUtils; +import org.apache.flink.util.ExecutorUtils; +import org.apache.flink.util.FlinkException; +import org.apache.flink.util.TestLogger; +import org.apache.flink.util.function.ThrowingConsumer; +import org.apache.flink.util.function.TriFunctionWithException; + +import org.hamcrest.core.Is; +import org.junit.After; +import org.junit.AfterClass; +import org.junit.Assert; +import org.junit.Before; +import org.junit.BeforeClass; +import org.junit.Test; + +import java.util.Collection; +import java.util.Collections; +import java.util.Map; +import java.util.UUID; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.TimeoutException; + +import static org.hamcrest.CoreMatchers.is; +import static org.hamcrest.MatcherAssert.assertThat; +import static org.hamcrest.Matchers.containsInAnyOrder; +import static org.hamcrest.Matchers.hasSize; +import static org.junit.Assert.assertTrue; +import static org.junit.Assert.fail; + +/** + * Tests for the {@link SessionDispatcherLeaderProcess}. + */ +public class SessionDispatcherLeaderProcessTest extends TestLogger { + + private static final JobGraph JOB_GRAPH = new JobGraph("JobGraph"); + + private static ExecutorService ioExecutor; + + private final UUID leaderSessionId = UUID.randomUUID(); + + private TestingFatalErrorHandler fatalErrorHandler; + + private JobGraphStore jobGraphStore; + + private TestingDispatcherServiceFactory dispatcherServiceFactory; + + @BeforeClass + public static void setupClass() { + ioExecutor = Executors.newSingleThreadExecutor(); + } + + @Before + public void setup() { + fatalErrorHandler = new TestingFatalErrorHandler(); + jobGraphStore = TestingJobGraphStore.newBuilder().build(); + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder().build(); + } + + @After + public void teardown() throws Exception { + if (fatalErrorHandler != null) { + fatalErrorHandler.rethrowError(); + fatalErrorHandler = null; + } + } + + @AfterClass + public static void teardownClass() { + if (ioExecutor != null) { + ExecutorUtils.gracefulShutdown(5L, TimeUnit.SECONDS, ioExecutor); + } + } + + @Test + public void start_afterClose_doesNotHaveAnEffect() throws Exception { + final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess(); + + dispatcherLeaderProcess.close(); + dispatcherLeaderProcess.start(); + + assertThat(dispatcherLeaderProcess.getState(), is(SessionDispatcherLeaderProcess.State.STOPPED)); + } + + @Test + public void start_triggersJobGraphRecoveryAndDispatcherServiceCreation() throws Exception { + jobGraphStore = TestingJobGraphStore.newBuilder() + .setInitialJobGraphs(Collections.singleton(JOB_GRAPH)) + .build(); + + final CompletableFuture<Collection<JobGraph>> recoveredJobGraphsFuture = new CompletableFuture<>(); + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction( + (fencingToken, recoveredJobGraphs, jobGraphStore) -> { + recoveredJobGraphsFuture.complete(recoveredJobGraphs); + return TestingDispatcherService.newBuilder().build(); + } + ) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + assertThat(dispatcherLeaderProcess.getState(), is(SessionDispatcherLeaderProcess.State.RUNNING)); + + final Collection<JobGraph> recoveredJobGraphs = recoveredJobGraphsFuture.get(); + + assertThat(recoveredJobGraphs, hasSize(1)); + assertThat(recoveredJobGraphs, containsInAnyOrder(JOB_GRAPH)); + } + } + + @Test + public void closeAsync_stopsJobGraphStoreAndDispatcher() throws Exception { + final CompletableFuture<Void> jobGraphStopFuture = new CompletableFuture<>(); + jobGraphStore = TestingJobGraphStore.newBuilder() + .setStopRunnable(() -> jobGraphStopFuture.complete(null)) + .build(); + + final CompletableFuture<Void> dispatcherServiceTerminationFuture = new CompletableFuture<>(); + final OneShotLatch dispatcherServiceShutdownLatch = new OneShotLatch(); + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction((ignoredA, ignoredB, ignoredC) -> TestingDispatcherService.newBuilder() + .setTerminationFutureSupplier(() -> { + dispatcherServiceShutdownLatch.trigger(); + return dispatcherServiceTerminationFuture; + }) + .build()) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait for the creation of the DispatcherService + dispatcherLeaderProcess.getDispatcherGateway().get(); + + final CompletableFuture<Void> terminationFuture = dispatcherLeaderProcess.closeAsync(); + + assertThat(jobGraphStopFuture.isDone(), is(false)); + assertThat(terminationFuture.isDone(), is(false)); + + dispatcherServiceShutdownLatch.await(); + dispatcherServiceTerminationFuture.complete(null); + + // verify that we shut down the JobGraphStore + jobGraphStopFuture.get(); + + // verify that we completed the dispatcher leader process shut down + terminationFuture.get(); + } + } + + @Test + public void confirmLeaderSessionFuture_completesAfterDispatcherServiceHasBeenStarted() throws Exception { + final OneShotLatch createDispatcherServiceLatch = new OneShotLatch(); + final String dispatcherAddress = "myAddress"; + final TestingDispatcherGateway dispatcherGateway = new TestingDispatcherGateway.Builder() + .setAddress(dispatcherAddress) + .build(); + + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction( + TriFunctionWithException.unchecked((ignoredA, ignoredB, ignoredC) -> { + createDispatcherServiceLatch.await(); + return TestingDispatcherService.newBuilder() + .setDispatcherGateway(dispatcherGateway) + .build(); + })) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + final CompletableFuture<String> confirmLeaderSessionFuture = dispatcherLeaderProcess.getConfirmLeaderSessionFuture(); + + dispatcherLeaderProcess.start(); + + assertThat(confirmLeaderSessionFuture.isDone(), is(false)); + + createDispatcherServiceLatch.trigger(); + + assertThat(confirmLeaderSessionFuture.get(), is(dispatcherAddress)); + } + } + + @Test + public void closeAsync_duringJobRecovery_preventsDispatcherServiceCreation() throws Exception { + final OneShotLatch jobRecoveryStarted = new OneShotLatch(); + final OneShotLatch completeJobRecovery = new OneShotLatch(); + final OneShotLatch createDispatcherService = new OneShotLatch(); + + this.jobGraphStore = TestingJobGraphStore.newBuilder() + .setJobIdsFunction(storedJobs -> { + jobRecoveryStarted.trigger(); + completeJobRecovery.await(); + return storedJobs; + }) + .build(); + + this.dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction( + (ignoredA, ignoredB, ignoredC) -> { + createDispatcherService.trigger(); + return TestingDispatcherService.newBuilder().build(); + }) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + jobRecoveryStarted.await(); + + dispatcherLeaderProcess.closeAsync(); + + completeJobRecovery.trigger(); + + try { + createDispatcherService.await(10L, TimeUnit.MILLISECONDS); + fail("No dispatcher service should be created after the process has been stopped."); + } catch (TimeoutException expected) {} + } + } + + @Test + public void onRemovedJobGraph_terminatesRunningJob() throws Exception { + jobGraphStore = TestingJobGraphStore.newBuilder() + .setInitialJobGraphs(Collections.singleton(JOB_GRAPH)) + .build(); + + final CompletableFuture<JobID> terminateJobFuture = new CompletableFuture<>(); + final TestingDispatcherService testingDispatcherService = TestingDispatcherService.newBuilder() + .setOnRemovedJobGraphFunction(jobID -> { + terminateJobFuture.complete(jobID); + return FutureUtils.completedVoidFuture(); + }) + .build(); + + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction((dispatcherId, jobGraphs, jobGraphWriter) -> testingDispatcherService) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait for the dispatcher process to be created + dispatcherLeaderProcess.getDispatcherGateway().get(); + + // now remove the Job from the JobGraphStore and notify the dispatcher service + jobGraphStore.removeJobGraph(JOB_GRAPH.getJobID()); + dispatcherLeaderProcess.onRemovedJobGraph(JOB_GRAPH.getJobID()); + + assertThat(terminateJobFuture.get(), is(JOB_GRAPH.getJobID())); + } + } + + @Test + public void onRemovedJobGraph_failingRemovalCall_failsFatally() throws Exception { + final FlinkException testException = new FlinkException("Test exception"); + + final TestingDispatcherService testingDispatcherService = TestingDispatcherService.newBuilder() + .setOnRemovedJobGraphFunction(jobID -> FutureUtils.completedExceptionally(testException)) + .build(); + + dispatcherServiceFactory = TestingDispatcherServiceFactory.newBuilder() + .setCreateFunction((dispatcherId, jobGraphs, jobGraphWriter) -> testingDispatcherService) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait for the dispatcher process to be created + dispatcherLeaderProcess.getDispatcherGateway().get(); + + // now notify the dispatcher service + dispatcherLeaderProcess.onRemovedJobGraph(JOB_GRAPH.getJobID()); + + final Throwable fatalError = fatalErrorHandler.getErrorFuture().join(); + + assertTrue(ExceptionUtils.findThrowable(fatalError, cause -> cause.equals(testException)).isPresent()); + + fatalErrorHandler.clearError(); + } + } + + @Test + public void onAddedJobGraph_submitsRecoveredJob() throws Exception { + final CompletableFuture<JobGraph> submittedJobFuture = new CompletableFuture<>(); + final TestingDispatcherGateway testingDispatcherGateway = new TestingDispatcherGateway.Builder() + .setSubmitFunction( + submittedJob -> { + submittedJobFuture.complete(submittedJob); + return CompletableFuture.completedFuture(Acknowledge.get()); + }) + .build(); + + dispatcherServiceFactory = createDispatcherServiceFactoryFor(testingDispatcherGateway); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait first for the dispatcher service to be created + dispatcherLeaderProcess.getDispatcherGateway().get(); + + jobGraphStore.putJobGraph(JOB_GRAPH); + dispatcherLeaderProcess.onAddedJobGraph(JOB_GRAPH.getJobID()); + + final JobGraph submittedJobGraph = submittedJobFuture.get(); + + assertThat(submittedJobGraph.getJobID(), is(JOB_GRAPH.getJobID())); + } + } + + @Test + public void onAddedJobGraph_ifNotRunning_isBeingIgnored() throws Exception { + final CompletableFuture<JobID> recoveredJobFuture = new CompletableFuture<>(); + jobGraphStore = TestingJobGraphStore.newBuilder() + .setRecoverJobGraphFunction( + (jobId, jobGraphs) -> { + recoveredJobFuture.complete(jobId); + return jobGraphs.get(jobId); + }) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait until the process has started the dispatcher + dispatcherLeaderProcess.getDispatcherGateway().get(); + + // now add the job graph + jobGraphStore.putJobGraph(JOB_GRAPH); + + dispatcherLeaderProcess.closeAsync(); + + dispatcherLeaderProcess.onAddedJobGraph(JOB_GRAPH.getJobID()); + + try { + recoveredJobFuture.get(10L, TimeUnit.MILLISECONDS); + fail("onAddedJobGraph should be ignored if the leader process is not running."); + } catch (TimeoutException expected) {} + } + } + + @Test + public void onAddedJobGraph_failingRecovery_propagatesTheFailure() throws Exception { + final FlinkException expectedFailure = new FlinkException("Expected failure"); + jobGraphStore = TestingJobGraphStore.newBuilder() + .setRecoverJobGraphFunction( + (ignoredA, ignoredB) -> { + throw expectedFailure; + }) + .build(); + + try (final SessionDispatcherLeaderProcess dispatcherLeaderProcess = createDispatcherLeaderProcess()) { + dispatcherLeaderProcess.start(); + + // wait first for the dispatcher service to be created + dispatcherLeaderProcess.getDispatcherGateway().get(); + + jobGraphStore.putJobGraph(JOB_GRAPH); + dispatcherLeaderProcess.onAddedJobGraph(JOB_GRAPH.getJobID()); + + final CompletableFuture<Throwable> errorFuture = fatalErrorHandler.getErrorFuture(); + final Throwable throwable = errorFuture.get(); + Assert.assertThat(ExceptionUtils.findThrowable(throwable, expectedFailure::equals).isPresent(), Is.is(true)); + + assertThat(dispatcherLeaderProcess.getState(), is(SessionDispatcherLeaderProcess.State.STOPPED)); + + fatalErrorHandler.clearError(); + } + } + + @Test + public void recoverJobs_withRecoveryFailure_failsFatally() throws Exception { + final FlinkException testException = new FlinkException("Test exception"); + jobGraphStore = TestingJobGraphStore.newBuilder() + .setRecoverJobGraphFunction( + (JobID jobId, Map<JobID, JobGraph> jobGraphs) -> { Review comment: Will remove them. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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