kafka.controller.ControllerChannelManager.scala Maven / Gradle / Ivy
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/**
* 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 kafka.controller
import java.net.SocketTimeoutException
import java.util.concurrent.{BlockingQueue, LinkedBlockingQueue}
import com.yammer.metrics.core.Gauge
import kafka.api._
import kafka.cluster.Broker
import kafka.common.{KafkaException, TopicAndPartition}
import kafka.metrics.KafkaMetricsGroup
import kafka.server.KafkaConfig
import kafka.utils._
import org.apache.kafka.clients._
import org.apache.kafka.common.metrics.Metrics
import org.apache.kafka.common.network._
import org.apache.kafka.common.protocol.{ApiKeys, SecurityProtocol}
import org.apache.kafka.common.requests.UpdateMetadataRequest.EndPoint
import org.apache.kafka.common.requests.{UpdateMetadataRequest, _}
import org.apache.kafka.common.security.JaasContext
import org.apache.kafka.common.utils.Time
import org.apache.kafka.common.{Node, TopicPartition, requests}
import scala.collection.JavaConverters._
import scala.collection.mutable.HashMap
import scala.collection.{Set, mutable}
object ControllerChannelManager {
val QueueSizeMetricName = "QueueSize"
}
class ControllerChannelManager(controllerContext: ControllerContext, config: KafkaConfig, time: Time, metrics: Metrics,
threadNamePrefix: Option[String] = None) extends Logging with KafkaMetricsGroup {
import ControllerChannelManager._
protected val brokerStateInfo = new HashMap[Int, ControllerBrokerStateInfo]
private val brokerLock = new Object
this.logIdent = "[Channel manager on controller " + config.brokerId + "]: "
newGauge(
"TotalQueueSize",
new Gauge[Int] {
def value: Int = brokerLock synchronized {
brokerStateInfo.values.iterator.map(_.messageQueue.size).sum
}
}
)
controllerContext.liveBrokers.foreach(addNewBroker)
def startup() = {
brokerLock synchronized {
brokerStateInfo.foreach(brokerState => startRequestSendThread(brokerState._1))
}
}
def shutdown() = {
brokerLock synchronized {
brokerStateInfo.values.foreach(removeExistingBroker)
}
}
def sendRequest(brokerId: Int, apiKey: ApiKeys, request: AbstractRequest.Builder[_ <: AbstractRequest],
callback: AbstractResponse => Unit = null) {
brokerLock synchronized {
val stateInfoOpt = brokerStateInfo.get(brokerId)
stateInfoOpt match {
case Some(stateInfo) =>
stateInfo.messageQueue.put(QueueItem(apiKey, request, callback))
case None =>
warn("Not sending request %s to broker %d, since it is offline.".format(request, brokerId))
}
}
}
def addBroker(broker: Broker) {
// be careful here. Maybe the startup() API has already started the request send thread
brokerLock synchronized {
if(!brokerStateInfo.contains(broker.id)) {
addNewBroker(broker)
startRequestSendThread(broker.id)
}
}
}
def removeBroker(brokerId: Int) {
brokerLock synchronized {
removeExistingBroker(brokerStateInfo(brokerId))
}
}
private def addNewBroker(broker: Broker) {
val messageQueue = new LinkedBlockingQueue[QueueItem]
debug("Controller %d trying to connect to broker %d".format(config.brokerId, broker.id))
val brokerNode = broker.getNode(config.interBrokerListenerName)
val networkClient = {
val channelBuilder = ChannelBuilders.clientChannelBuilder(
config.interBrokerSecurityProtocol,
JaasContext.Type.SERVER,
config,
config.interBrokerListenerName,
config.saslMechanismInterBrokerProtocol,
config.saslInterBrokerHandshakeRequestEnable
)
val selector = new Selector(
NetworkReceive.UNLIMITED,
Selector.NO_IDLE_TIMEOUT_MS,
metrics,
time,
"controller-channel",
Map("broker-id" -> broker.id.toString).asJava,
false,
channelBuilder
)
new NetworkClient(
selector,
new ManualMetadataUpdater(Seq(brokerNode).asJava),
config.brokerId.toString,
1,
0,
0,
Selectable.USE_DEFAULT_BUFFER_SIZE,
Selectable.USE_DEFAULT_BUFFER_SIZE,
config.requestTimeoutMs,
time,
false,
new ApiVersions
)
}
val threadName = threadNamePrefix match {
case None => "Controller-%d-to-broker-%d-send-thread".format(config.brokerId, broker.id)
case Some(name) => "%s:Controller-%d-to-broker-%d-send-thread".format(name, config.brokerId, broker.id)
}
val requestThread = new RequestSendThread(config.brokerId, controllerContext, messageQueue, networkClient,
brokerNode, config, time, threadName)
requestThread.setDaemon(false)
val queueSizeGauge = newGauge(
QueueSizeMetricName,
new Gauge[Int] {
def value: Int = messageQueue.size
},
queueSizeTags(broker.id)
)
brokerStateInfo.put(broker.id, new ControllerBrokerStateInfo(networkClient, brokerNode, messageQueue,
requestThread, queueSizeGauge))
}
private def queueSizeTags(brokerId: Int) = Map("broker-id" -> brokerId.toString)
private def removeExistingBroker(brokerState: ControllerBrokerStateInfo) {
try {
// Shutdown the RequestSendThread before closing the NetworkClient to avoid the concurrent use of the
// non-threadsafe classes as described in KAFKA-4959.
// The call to shutdownLatch.await() in ShutdownableThread.shutdown() serves as a synchronization barrier that
// hands off the NetworkClient from the RequestSendThread to the ZkEventThread.
brokerState.requestSendThread.shutdown()
brokerState.networkClient.close()
brokerState.messageQueue.clear()
removeMetric(QueueSizeMetricName, queueSizeTags(brokerState.brokerNode.id))
brokerStateInfo.remove(brokerState.brokerNode.id)
} catch {
case e: Throwable => error("Error while removing broker by the controller", e)
}
}
protected def startRequestSendThread(brokerId: Int) {
val requestThread = brokerStateInfo(brokerId).requestSendThread
if(requestThread.getState == Thread.State.NEW)
requestThread.start()
}
}
case class QueueItem(apiKey: ApiKeys, request: AbstractRequest.Builder[_ <: AbstractRequest],
callback: AbstractResponse => Unit)
class RequestSendThread(val controllerId: Int,
val controllerContext: ControllerContext,
val queue: BlockingQueue[QueueItem],
val networkClient: NetworkClient,
val brokerNode: Node,
val config: KafkaConfig,
val time: Time,
name: String)
extends ShutdownableThread(name = name) {
private val stateChangeLogger = KafkaController.stateChangeLogger
private val socketTimeoutMs = config.controllerSocketTimeoutMs
override def doWork(): Unit = {
def backoff(): Unit = CoreUtils.swallowTrace(Thread.sleep(100))
val QueueItem(apiKey, requestBuilder, callback) = queue.take()
var clientResponse: ClientResponse = null
try {
var isSendSuccessful = false
while (isRunning.get() && !isSendSuccessful) {
// if a broker goes down for a long time, then at some point the controller's zookeeper listener will trigger a
// removeBroker which will invoke shutdown() on this thread. At that point, we will stop retrying.
try {
if (!brokerReady()) {
isSendSuccessful = false
backoff()
}
else {
val clientRequest = networkClient.newClientRequest(brokerNode.idString, requestBuilder,
time.milliseconds(), true)
clientResponse = NetworkClientUtils.sendAndReceive(networkClient, clientRequest, time)
isSendSuccessful = true
}
} catch {
case e: Throwable => // if the send was not successful, reconnect to broker and resend the message
warn(("Controller %d epoch %d fails to send request %s to broker %s. " +
"Reconnecting to broker.").format(controllerId, controllerContext.epoch,
requestBuilder.toString, brokerNode.toString), e)
networkClient.close(brokerNode.idString)
isSendSuccessful = false
backoff()
}
}
if (clientResponse != null) {
val requestHeader = clientResponse.requestHeader
val api = ApiKeys.forId(requestHeader.apiKey)
if (api != ApiKeys.LEADER_AND_ISR && api != ApiKeys.STOP_REPLICA && api != ApiKeys.UPDATE_METADATA_KEY)
throw new KafkaException(s"Unexpected apiKey received: $apiKey")
val response = clientResponse.responseBody
stateChangeLogger.trace("Controller %d epoch %d received response %s for a request sent to broker %s"
.format(controllerId, controllerContext.epoch, response.toString(requestHeader.apiVersion), brokerNode.toString))
if (callback != null) {
callback(response)
}
}
} catch {
case e: Throwable =>
error("Controller %d fails to send a request to broker %s".format(controllerId, brokerNode.toString), e)
// If there is any socket error (eg, socket timeout), the connection is no longer usable and needs to be recreated.
networkClient.close(brokerNode.idString)
}
}
private def brokerReady(): Boolean = {
try {
if (!NetworkClientUtils.isReady(networkClient, brokerNode, time.milliseconds())) {
if (!NetworkClientUtils.awaitReady(networkClient, brokerNode, time, socketTimeoutMs))
throw new SocketTimeoutException(s"Failed to connect within $socketTimeoutMs ms")
info("Controller %d connected to %s for sending state change requests".format(controllerId, brokerNode.toString))
}
true
} catch {
case e: Throwable =>
warn("Controller %d's connection to broker %s was unsuccessful".format(controllerId, brokerNode.toString), e)
networkClient.close(brokerNode.idString)
false
}
}
}
class ControllerBrokerRequestBatch(controller: KafkaController) extends Logging {
val controllerContext = controller.controllerContext
val controllerId: Int = controller.config.brokerId
val leaderAndIsrRequestMap = mutable.Map.empty[Int, mutable.Map[TopicPartition, PartitionStateInfo]]
val stopReplicaRequestMap = mutable.Map.empty[Int, Seq[StopReplicaRequestInfo]]
val updateMetadataRequestBrokerSet = mutable.Set.empty[Int]
val updateMetadataRequestPartitionInfoMap = mutable.Map.empty[TopicPartition, PartitionStateInfo]
private val stateChangeLogger = KafkaController.stateChangeLogger
def newBatch() {
// raise error if the previous batch is not empty
if (leaderAndIsrRequestMap.nonEmpty)
throw new IllegalStateException("Controller to broker state change requests batch is not empty while creating " +
"a new one. Some LeaderAndIsr state changes %s might be lost ".format(leaderAndIsrRequestMap.toString()))
if (stopReplicaRequestMap.nonEmpty)
throw new IllegalStateException("Controller to broker state change requests batch is not empty while creating a " +
"new one. Some StopReplica state changes %s might be lost ".format(stopReplicaRequestMap.toString()))
if (updateMetadataRequestBrokerSet.nonEmpty)
throw new IllegalStateException("Controller to broker state change requests batch is not empty while creating a " +
"new one. Some UpdateMetadata state changes to brokers %s with partition info %s might be lost ".format(
updateMetadataRequestBrokerSet.toString(), updateMetadataRequestPartitionInfoMap.toString()))
}
def clear() {
leaderAndIsrRequestMap.clear()
stopReplicaRequestMap.clear()
updateMetadataRequestBrokerSet.clear()
updateMetadataRequestPartitionInfoMap.clear()
}
def addLeaderAndIsrRequestForBrokers(brokerIds: Seq[Int], topic: String, partition: Int,
leaderIsrAndControllerEpoch: LeaderIsrAndControllerEpoch,
replicas: Seq[Int], callback: AbstractResponse => Unit = null) {
val topicPartition = new TopicPartition(topic, partition)
brokerIds.filter(_ >= 0).foreach { brokerId =>
val result = leaderAndIsrRequestMap.getOrElseUpdate(brokerId, mutable.Map.empty)
result.put(topicPartition, PartitionStateInfo(leaderIsrAndControllerEpoch, replicas))
}
addUpdateMetadataRequestForBrokers(controllerContext.liveOrShuttingDownBrokerIds.toSeq,
Set(TopicAndPartition(topic, partition)))
}
def addStopReplicaRequestForBrokers(brokerIds: Seq[Int], topic: String, partition: Int, deletePartition: Boolean,
callback: (AbstractResponse, Int) => Unit = null) {
brokerIds.filter(b => b >= 0).foreach { brokerId =>
stopReplicaRequestMap.getOrElseUpdate(brokerId, Seq.empty[StopReplicaRequestInfo])
val v = stopReplicaRequestMap(brokerId)
if(callback != null)
stopReplicaRequestMap(brokerId) = v :+ StopReplicaRequestInfo(PartitionAndReplica(topic, partition, brokerId),
deletePartition, (r: AbstractResponse) => callback(r, brokerId))
else
stopReplicaRequestMap(brokerId) = v :+ StopReplicaRequestInfo(PartitionAndReplica(topic, partition, brokerId),
deletePartition)
}
}
/** Send UpdateMetadataRequest to the given brokers for the given partitions and partitions that are being deleted */
def addUpdateMetadataRequestForBrokers(brokerIds: Seq[Int],
partitions: collection.Set[TopicAndPartition] = Set.empty[TopicAndPartition]) {
def updateMetadataRequestPartitionInfo(partition: TopicAndPartition, beingDeleted: Boolean) {
val leaderIsrAndControllerEpochOpt = controllerContext.partitionLeadershipInfo.get(partition)
leaderIsrAndControllerEpochOpt match {
case Some(l @ LeaderIsrAndControllerEpoch(leaderAndIsr, controllerEpoch)) =>
val replicas = controllerContext.partitionReplicaAssignment(partition)
val leaderIsrAndControllerEpoch = if (beingDeleted) {
val leaderDuringDelete = LeaderAndIsr.duringDelete(leaderAndIsr.isr)
LeaderIsrAndControllerEpoch(leaderDuringDelete, controllerEpoch)
} else {
l
}
val partitionStateInfo = PartitionStateInfo(leaderIsrAndControllerEpoch, replicas)
updateMetadataRequestPartitionInfoMap.put(new TopicPartition(partition.topic, partition.partition), partitionStateInfo)
case None =>
info("Leader not yet assigned for partition %s. Skip sending UpdateMetadataRequest.".format(partition))
}
}
val filteredPartitions = {
val givenPartitions = if (partitions.isEmpty)
controllerContext.partitionLeadershipInfo.keySet
else
partitions
if (controller.topicDeletionManager.partitionsToBeDeleted.isEmpty)
givenPartitions
else
givenPartitions -- controller.topicDeletionManager.partitionsToBeDeleted
}
updateMetadataRequestBrokerSet ++= brokerIds.filter(_ >= 0)
filteredPartitions.foreach(partition => updateMetadataRequestPartitionInfo(partition, beingDeleted = false))
controller.topicDeletionManager.partitionsToBeDeleted.foreach(partition => updateMetadataRequestPartitionInfo(partition, beingDeleted = true))
}
def sendRequestsToBrokers(controllerEpoch: Int) {
try {
leaderAndIsrRequestMap.foreach { case (broker, partitionStateInfos) =>
partitionStateInfos.foreach { case (topicPartition, state) =>
val typeOfRequest =
if (broker == state.leaderIsrAndControllerEpoch.leaderAndIsr.leader) "become-leader"
else "become-follower"
stateChangeLogger.trace(("Controller %d epoch %d sending %s LeaderAndIsr request %s to broker %d " +
"for partition [%s,%d]").format(controllerId, controllerEpoch, typeOfRequest,
state.leaderIsrAndControllerEpoch, broker,
topicPartition.topic, topicPartition.partition))
}
val leaderIds = partitionStateInfos.map(_._2.leaderIsrAndControllerEpoch.leaderAndIsr.leader).toSet
val leaders = controllerContext.liveOrShuttingDownBrokers.filter(b => leaderIds.contains(b.id)).map {
_.getNode(controller.config.interBrokerListenerName)
}
val partitionStates = partitionStateInfos.map { case (topicPartition, partitionStateInfo) =>
val LeaderIsrAndControllerEpoch(leaderIsr, controllerEpoch) = partitionStateInfo.leaderIsrAndControllerEpoch
val partitionState = new requests.PartitionState(controllerEpoch, leaderIsr.leader,
leaderIsr.leaderEpoch, leaderIsr.isr.map(Integer.valueOf).asJava, leaderIsr.zkVersion,
partitionStateInfo.allReplicas.map(Integer.valueOf).asJava)
topicPartition -> partitionState
}
val leaderAndIsrRequest = new LeaderAndIsrRequest.Builder(controllerId, controllerEpoch, partitionStates.asJava,
leaders.asJava)
controller.sendRequest(broker, ApiKeys.LEADER_AND_ISR, leaderAndIsrRequest)
}
leaderAndIsrRequestMap.clear()
updateMetadataRequestPartitionInfoMap.foreach(p => stateChangeLogger.trace(("Controller %d epoch %d sending UpdateMetadata request %s " +
"to brokers %s for partition %s").format(controllerId, controllerEpoch, p._2.leaderIsrAndControllerEpoch,
updateMetadataRequestBrokerSet.toString(), p._1)))
val partitionStates = updateMetadataRequestPartitionInfoMap.map { case (topicPartition, partitionStateInfo) =>
val LeaderIsrAndControllerEpoch(leaderIsr, controllerEpoch) = partitionStateInfo.leaderIsrAndControllerEpoch
val partitionState = new requests.PartitionState(controllerEpoch, leaderIsr.leader,
leaderIsr.leaderEpoch, leaderIsr.isr.map(Integer.valueOf).asJava, leaderIsr.zkVersion,
partitionStateInfo.allReplicas.map(Integer.valueOf).asJava)
topicPartition -> partitionState
}
val version: Short =
if (controller.config.interBrokerProtocolVersion >= KAFKA_0_10_2_IV0) 3
else if (controller.config.interBrokerProtocolVersion >= KAFKA_0_10_0_IV1) 2
else if (controller.config.interBrokerProtocolVersion >= KAFKA_0_9_0) 1
else 0
val updateMetadataRequest = {
val liveBrokers = if (version == 0) {
// Version 0 of UpdateMetadataRequest only supports PLAINTEXT.
controllerContext.liveOrShuttingDownBrokers.map { broker =>
val securityProtocol = SecurityProtocol.PLAINTEXT
val listenerName = ListenerName.forSecurityProtocol(securityProtocol)
val node = broker.getNode(listenerName)
val endPoints = Seq(new EndPoint(node.host, node.port, securityProtocol, listenerName))
new UpdateMetadataRequest.Broker(broker.id, endPoints.asJava, broker.rack.orNull)
}
} else {
controllerContext.liveOrShuttingDownBrokers.map { broker =>
val endPoints = broker.endPoints.map { endPoint =>
new UpdateMetadataRequest.EndPoint(endPoint.host, endPoint.port, endPoint.securityProtocol, endPoint.listenerName)
}
new UpdateMetadataRequest.Broker(broker.id, endPoints.asJava, broker.rack.orNull)
}
}
new UpdateMetadataRequest.Builder(version, controllerId, controllerEpoch, partitionStates.asJava,
liveBrokers.asJava)
}
updateMetadataRequestBrokerSet.foreach { broker =>
controller.sendRequest(broker, ApiKeys.UPDATE_METADATA_KEY, updateMetadataRequest, null)
}
updateMetadataRequestBrokerSet.clear()
updateMetadataRequestPartitionInfoMap.clear()
stopReplicaRequestMap.foreach { case (broker, replicaInfoList) =>
val stopReplicaWithDelete = replicaInfoList.filter(_.deletePartition).map(_.replica).toSet
val stopReplicaWithoutDelete = replicaInfoList.filterNot(_.deletePartition).map(_.replica).toSet
debug("The stop replica request (delete = true) sent to broker %d is %s"
.format(broker, stopReplicaWithDelete.mkString(",")))
debug("The stop replica request (delete = false) sent to broker %d is %s"
.format(broker, stopReplicaWithoutDelete.mkString(",")))
val (replicasToGroup, replicasToNotGroup) = replicaInfoList.partition(r => !r.deletePartition && r.callback == null)
// Send one StopReplicaRequest for all partitions that require neither delete nor callback. This potentially
// changes the order in which the requests are sent for the same partitions, but that's OK.
val stopReplicaRequest = new StopReplicaRequest.Builder(controllerId, controllerEpoch, false,
replicasToGroup.map(r => new TopicPartition(r.replica.topic, r.replica.partition)).toSet.asJava)
controller.sendRequest(broker, ApiKeys.STOP_REPLICA, stopReplicaRequest)
replicasToNotGroup.foreach { r =>
val stopReplicaRequest = new StopReplicaRequest.Builder(
controllerId, controllerEpoch, r.deletePartition,
Set(new TopicPartition(r.replica.topic, r.replica.partition)).asJava)
controller.sendRequest(broker, ApiKeys.STOP_REPLICA, stopReplicaRequest, r.callback)
}
}
stopReplicaRequestMap.clear()
} catch {
case e: Throwable =>
if (leaderAndIsrRequestMap.nonEmpty) {
error("Haven't been able to send leader and isr requests, current state of " +
s"the map is $leaderAndIsrRequestMap. Exception message: $e")
}
if (updateMetadataRequestBrokerSet.nonEmpty) {
error(s"Haven't been able to send metadata update requests to brokers $updateMetadataRequestBrokerSet, " +
s"current state of the partition info is $updateMetadataRequestPartitionInfoMap. Exception message: $e")
}
if (stopReplicaRequestMap.nonEmpty) {
error("Haven't been able to send stop replica requests, current state of " +
s"the map is $stopReplicaRequestMap. Exception message: $e")
}
throw new IllegalStateException(e)
}
}
}
case class ControllerBrokerStateInfo(networkClient: NetworkClient,
brokerNode: Node,
messageQueue: BlockingQueue[QueueItem],
requestSendThread: RequestSendThread,
queueSizeGauge: Gauge[Int])
case class StopReplicaRequestInfo(replica: PartitionAndReplica, deletePartition: Boolean, callback: AbstractResponse => Unit = null)
class Callbacks private (var leaderAndIsrResponseCallback: AbstractResponse => Unit = null,
var updateMetadataResponseCallback: AbstractResponse => Unit = null,
var stopReplicaResponseCallback: (AbstractResponse, Int) => Unit = null)
object Callbacks {
class CallbackBuilder {
var leaderAndIsrResponseCbk: AbstractResponse => Unit = null
var updateMetadataResponseCbk: AbstractResponse => Unit = null
var stopReplicaResponseCbk: (AbstractResponse, Int) => Unit = null
def leaderAndIsrCallback(cbk: AbstractResponse => Unit): CallbackBuilder = {
leaderAndIsrResponseCbk = cbk
this
}
def updateMetadataCallback(cbk: AbstractResponse => Unit): CallbackBuilder = {
updateMetadataResponseCbk = cbk
this
}
def stopReplicaCallback(cbk: (AbstractResponse, Int) => Unit): CallbackBuilder = {
stopReplicaResponseCbk = cbk
this
}
def build: Callbacks = {
new Callbacks(leaderAndIsrResponseCbk, updateMetadataResponseCbk, stopReplicaResponseCbk)
}
}
}
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