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From Neha Narkhede <neha.narkh...@gmail.com>
Subject Re: Question on StateChangeFailedException
Date Sat, 08 Mar 2014 01:56:57 GMT
Starting from a fresh and working deployment, what admin commands or steps
lead you to these errors? This error basically points to an unexpected
state change, which could be a bug. I'm looking for steps to be able to
reproduce the bug.

Thanks,
Neha


On Fri, Mar 7, 2014 at 1:59 PM, Bae, Jae Hyeon <metacret@gmail.com> wrote:

> How can I prevent these errors coming?
>
> When I created 9 partitions on 3 instances and 2 replication-factor, I
> didn't have any error. But when I created 36 partitions on 12 instances, I
> got these errors.
>
>
> 2014-03-07 18:19:28,208] ERROR Controller 9 epoch 12 initiated state change
> of replica 9 for partition [request_trace,3] from NonExistentReplica to
> NewReplica failed (state.change.logger)
> kafka.common.StateChangeFailedException: Replica 9 for partition
> [request_trace,3] cannot be moved to NewReplicastate as it is being
> requested to become leader
>         at
>
> kafka.controller.ReplicaStateMachine.handleStateChange(ReplicaStateMachine.scala:160)
>         at
>
> kafka.controller.ReplicaStateMachine$$anonfun$handleStateChanges$2.apply(ReplicaStateMachine.scala:96)
>         at
>
> kafka.controller.ReplicaStateMachine$$anonfun$handleStateChanges$2.apply(ReplicaStateMachine.scala:96)
>         at
> scala.collection.immutable.HashSet$HashSet1.foreach(HashSet.scala:123)
>         at
> scala.collection.immutable.HashSet$HashTrieSet.foreach(HashSet.scala:322)
>         at
> scala.collection.immutable.HashSet$HashTrieSet.foreach(HashSet.scala:322)
>         at
>
> kafka.controller.ReplicaStateMachine.handleStateChanges(ReplicaStateMachine.scala:96)
>         at
>
> kafka.controller.KafkaController.onNewPartitionCreation(KafkaController.scala:464)
>         at
>
> kafka.controller.KafkaController.onNewTopicCreation(KafkaController.scala:452)
>         at
>
> kafka.controller.PartitionStateMachine$TopicChangeListener$$anonfun$handleChildChange$1.apply$mcV$sp(PartitionStateMachine.scala:421)
>         at
>
> kafka.controller.PartitionStateMachine$TopicChangeListener$$anonfun$handleChildChange$1.apply(PartitionStateMachine.scala:403)
>         at
>
> kafka.controller.PartitionStateMachine$TopicChangeListener$$anonfun$handleChildChange$1.apply(PartitionStateMachine.scala:403)
>         at kafka.utils.Utils$.inLock(Utils.scala:538)
>         at
>
> kafka.controller.PartitionStateMachine$TopicChangeListener.handleChildChange(PartitionStateMachine.scala:402)
>         at org.I0Itec.zkclient.ZkClient$7.run(ZkClient.java:576)
>         at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:71)
>

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