spark BlockManagerMasterHeartbeatEndpoint 源码
spark BlockManagerMasterHeartbeatEndpoint 代码
文件路径：/core/src/main/scala/org/apache/spark/storage/BlockManagerMasterHeartbeatEndpoint.scala
/*
* 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.storage
import scala.collection.mutable
import org.apache.spark.internal.Logging
import org.apache.spark.rpc.{RpcCallContext, RpcEnv, ThreadSafeRpcEndpoint}
import org.apache.spark.storage.BlockManagerMessages.{BlockManagerHeartbeat, StopBlockManagerMaster}
/**
* Separate heartbeat out of BlockManagerMasterEndpoint due to performance consideration.
*/
private[spark] class BlockManagerMasterHeartbeatEndpoint(
override val rpcEnv: RpcEnv,
isLocal: Boolean,
blockManagerInfo: mutable.Map[BlockManagerId, BlockManagerInfo])
extends ThreadSafeRpcEndpoint with Logging {
override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
case BlockManagerHeartbeat(blockManagerId) =>
context.reply(heartbeatReceived(blockManagerId))
case StopBlockManagerMaster =>
stop()
context.reply(true)
case _ => // do nothing for unexpected events
}
/**
* Return true if the driver knows about the given block manager. Otherwise, return false,
* indicating that the block manager should re-register.
*/
private def heartbeatReceived(blockManagerId: BlockManagerId): Boolean = {
if (!blockManagerInfo.contains(blockManagerId)) {
blockManagerId.isDriver && !isLocal
} else {
blockManagerInfo(blockManagerId).updateLastSeenMs()
true
}
}
}
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