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https://issues.apache.org/jira/browse/KAFKA-1887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14330093#comment-14330093
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Sriharsha Chintalapani commented on KAFKA-1887:
-----------------------------------------------
[~nehanarkhede] I moved KafkaController.shutdown() followed by
KafkaHealthCheck.shutdown() above SocketServer.shutdown().
1) Moving kafkaHealthCheck below controller shutdown doesn't trigger
ReplicaStateMachine.BrokerChangeListener()
2) because of 1 controllerContext.controllerChannelManager.removeBroker for the
current brokerId and it continues exist in
controllerContext.controllerChannelManager.brokerStateInfo.
3) when kafkaController.shutdown() gets called it calls
controllerChannelManager.shutdown() and it will go through removeExistingBroker
for the brokerId whose SocketServer is shutdown causing
removeExistingBroker().brokerStateInfo(brokerId).channel.disconnect()
throw an exception . Because of this exception KafkaBroker.shutdown() is
slowing down.
In the above patch moved KafkaController.shutdown and KafkaHealthCheck.shutdown
above SocketServer.shutdown()
> controller error message on shutting the last broker
> ----------------------------------------------------
>
> Key: KAFKA-1887
> URL: https://issues.apache.org/jira/browse/KAFKA-1887
> Project: Kafka
> Issue Type: Bug
> Components: core
> Reporter: Jun Rao
> Assignee: Sriharsha Chintalapani
> Priority: Minor
> Fix For: 0.8.3
>
> Attachments: KAFKA-1887.patch
>
>
> We always see the following error in state-change log on shutting down the
> last broker.
> [2015-01-20 13:21:04,036] ERROR Controller 0 epoch 3 initiated state change
> for partition [test,0] from OfflinePartition to OnlinePartition failed
> (state.change.logger)
> kafka.common.NoReplicaOnlineException: No replica for partition [test,0] is
> alive. Live brokers are: [Set()], Assigned replicas are: [List(0)]
> at
> kafka.controller.OfflinePartitionLeaderSelector.selectLeader(PartitionLeaderSelector.scala:75)
> at
> kafka.controller.PartitionStateMachine.electLeaderForPartition(PartitionStateMachine.scala:357)
> at
> kafka.controller.PartitionStateMachine.kafka$controller$PartitionStateMachine$$handleStateChange(PartitionStateMachine.scala:206)
> at
> kafka.controller.PartitionStateMachine$$anonfun$triggerOnlinePartitionStateChange$3.apply(PartitionStateMachine.scala:120)
> at
> kafka.controller.PartitionStateMachine$$anonfun$triggerOnlinePartitionStateChange$3.apply(PartitionStateMachine.scala:117)
> at
> scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
> at
> scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)
> at
> scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)
> at
> scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:226)
> at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:39)
> at scala.collection.mutable.HashMap.foreach(HashMap.scala:98)
> at
> scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
> at
> kafka.controller.PartitionStateMachine.triggerOnlinePartitionStateChange(PartitionStateMachine.scala:117)
> at
> kafka.controller.KafkaController.onBrokerFailure(KafkaController.scala:446)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ReplicaStateMachine.scala:373)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1$$anonfun$apply$mcV$sp$1.apply(ReplicaStateMachine.scala:359)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1$$anonfun$apply$mcV$sp$1.apply(ReplicaStateMachine.scala:359)
> at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1.apply$mcV$sp(ReplicaStateMachine.scala:358)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1.apply(ReplicaStateMachine.scala:357)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener$$anonfun$handleChildChange$1.apply(ReplicaStateMachine.scala:357)
> at kafka.utils.Utils$.inLock(Utils.scala:535)
> at
> kafka.controller.ReplicaStateMachine$BrokerChangeListener.handleChildChange(ReplicaStateMachine.scala:356)
> at org.I0Itec.zkclient.ZkClient$7.run(ZkClient.java:568)
> at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:71)
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