dawidwys commented on a change in pull request #16184: URL: https://github.com/apache/flink/pull/16184#discussion_r668785212
########## File path: flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/MultipleInputStreamTaskChainedSourcesCheckpointingTest.java ########## @@ -330,6 +338,64 @@ public void testRpcTriggerCheckpointWithSourceChain() throws Exception { } } + @Test + public void testSkipExecutionsIfFinishedOnRestoreWithSourceChained() throws Exception { + OperatorID firstSourceOperatorId = new OperatorID(); + OperatorID secondSourceOperatorId = new OperatorID(); + OperatorID nonSourceOperatorId = new OperatorID(); + + try (StreamTaskMailboxTestHarness<String> testHarness = + new StreamTaskMailboxTestHarnessBuilder<>( + MultipleInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO) + .modifyStreamConfig(config -> config.setCheckpointingEnabled(true)) + .modifyExecutionConfig(ExecutionConfig::enableObjectReuse) + .addInput(BasicTypeInfo.INT_TYPE_INFO) + .addSourceInput( + firstSourceOperatorId, + new SourceOperatorFactory<>( + new SourceOperatorStreamTaskTest.LifeCycleMonitorSource( + Boundedness.BOUNDED, 1), Review comment: nit: as a safety precaution let's use the `CONTINUOUS_UNBOUNDED` here, theoretically for bounded sources we might not have checkpointing I know at this point we will, but let's do it for my peaces of mind ;) ########## File path: flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/SourceStreamTask.java ########## @@ -158,7 +158,16 @@ protected void processInput(MailboxDefaultAction.Controller controller) throws E // compatibility reasons with the current source interface (source functions run as a loop, // not in steps). sourceThread.setTaskDescription(getName()); - sourceThread.start(); + + if (operatorChain.isFinishedOnRestore()) { + LOG.debug( + "Legacy source {} skip execution since the task is finished on restore", + getTaskNameWithSubtaskAndId()); + sourceThread.getCompletionFuture().complete(null); Review comment: Shouldn't we suspend the `mailboxProcessor` here? It was being done before when the future completed. ########## File path: flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTaskFinishedOnRestoreSourceInput.java ########## @@ -0,0 +1,44 @@ +/* + * 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.streaming.runtime.tasks; + +import org.apache.flink.core.io.InputStatus; +import org.apache.flink.streaming.api.operators.SourceOperator; +import org.apache.flink.streaming.runtime.io.StreamTaskSourceInput; + +import java.util.concurrent.CompletableFuture; + +/** Guess what I'm going to do. */ Review comment: Let's maybe just add the answer ;) ########## File path: flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/MultipleInputStreamTaskChainedSourcesCheckpointingTest.java ########## @@ -380,4 +446,57 @@ private void processSingleStepUntil( } assertTrue(condition.get()); } + + static class LifeCycleMonitorMultipleInputOperator + extends MultipleInputStreamTaskTest.MapToStringMultipleInputOperator { + + private final StreamTaskTest.LifeCycleMonitor lifeCycleMonitor = + new StreamTaskTest.LifeCycleMonitor(); Review comment: nit: Let's move the `LifeCycleMonitor` to a top level file. ########## File path: flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/MultipleInputStreamTaskChainedSourcesCheckpointingTest.java ########## @@ -380,4 +446,57 @@ private void processSingleStepUntil( } assertTrue(condition.get()); } + + static class LifeCycleMonitorMultipleInputOperator + extends MultipleInputStreamTaskTest.MapToStringMultipleInputOperator { + + private final StreamTaskTest.LifeCycleMonitor lifeCycleMonitor = + new StreamTaskTest.LifeCycleMonitor(); + + public LifeCycleMonitorMultipleInputOperator(StreamOperatorParameters<String> parameters) { + super(parameters, 3); + } + + @Override + public void open() throws Exception { + super.open(); + lifeCycleMonitor.incrementCallTime(StreamTaskTest.LifeCyclePhase.OPEN); + } + + @Override + public void initializeState(StateInitializationContext context) throws Exception { + super.initializeState(context); + lifeCycleMonitor.incrementCallTime(StreamTaskTest.LifeCyclePhase.INITIALIZE_STATE); + } + + @Override + public void finish() throws Exception { + lifeCycleMonitor.incrementCallTime(StreamTaskTest.LifeCyclePhase.FINISH); Review comment: nit: super.finish(); -- This is an automated message from the Apache Git Service. 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