Github user xuanyuanking commented on a diff in the pull request: https://github.com/apache/spark/pull/22165#discussion_r215635587 --- Diff: core/src/test/scala/org/apache/spark/scheduler/BarrierCoordinatorSuite.scala --- @@ -0,0 +1,153 @@ +/* + * 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.spark.scheduler + +import java.util.concurrent.TimeoutException + +import scala.concurrent.duration._ +import scala.language.postfixOps + +import org.apache.spark._ +import org.apache.spark.rpc.RpcTimeout + +class BarrierCoordinatorSuite extends SparkFunSuite with LocalSparkContext { + + /** + * Get the current barrierEpoch from barrierCoordinator.states by ContextBarrierId + */ + def getCurrentBarrierEpoch( + stageId: Int, stageAttemptId: Int, barrierCoordinator: BarrierCoordinator): Int = { + val barrierId = ContextBarrierId(stageId, stageAttemptId) + barrierCoordinator.states.get(barrierId).barrierEpoch + } + + test("normal test for single task") { + sc = new SparkContext("local", "test") + val barrierCoordinator = new BarrierCoordinator(5, sc.listenerBus, sc.env.rpcEnv) + val rpcEndpointRef = sc.env.rpcEnv.setupEndpoint("barrierCoordinator", barrierCoordinator) + val stageId = 0 + val stageAttemptNumber = 0 + rpcEndpointRef.askSync[Unit]( + message = RequestToSync(numTasks = 1, stageId, stageAttemptNumber, taskAttemptId = 0, + barrierEpoch = 0), + timeout = new RpcTimeout(5 seconds, "rpcTimeOut")) + // sleep for waiting barrierEpoch value change + Thread.sleep(500) --- End diff -- Thanks for guidance, done in ecf12bd. I'll also pay attention in the future work.
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