Github user mengxr commented on a diff in the pull request: https://github.com/apache/spark/pull/21898#discussion_r206628185 --- Diff: core/src/main/scala/org/apache/spark/BarrierCoordinator.scala --- @@ -0,0 +1,184 @@ +/* + * 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 + +import java.util.{Timer, TimerTask} + +import scala.collection.mutable.{ArrayBuffer, HashMap} + +import org.apache.spark.internal.Logging +import org.apache.spark.rpc.{RpcCallContext, RpcEnv, ThreadSafeRpcEndpoint} + +class BarrierCoordinator( + timeout: Long, + override val rpcEnv: RpcEnv) extends ThreadSafeRpcEndpoint with Logging { + + private val timer = new Timer("BarrierCoordinator barrier epoch increment timer") + + // Barrier epoch for each stage attempt, fail a sync request if the barrier epoch in the request + // mismatches the barrier epoch in the coordinator. + private val barrierEpochByStageIdAndAttempt = new HashMap[Int, HashMap[Int, Int]] --- End diff -- +1.
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org