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Re: KeeperErrorCode = BadVersion
I think we can certainly improve the logging, but this is normal when the
leader tries to shrink/expand the ISR when the controller is in the middle
of shrinking ISR or electing a new leader for the same partition.

Could you please file a JIRA to improve the quality of logging in this case?

Thanks,
Neha
On Fri, Aug 23, 2013 at 10:28 AM, Yu, Libo <[EMAIL PROTECTED]> wrote:

> Hi team,
>
> During normal operation, all of a sudden, we found many exceptions in the
> log like this:
>
> It seems one thread' zookeeper's data is written unexpectedly by some
> other thread.
> Any expertise will be appreciated.
>
> [2013-08-23 13:17:00,622] INFO Partition [our.own.topic
> one.default,0] on broker 1: Cached zkVersion [4] not equal to that in zo
> okeeper, skip updating ISR (kafka.cluster.Partition)
> [2013-08-23 13:17:00,622] INFO Partition [our.own.topic.two.default,2]
> on broker 1: Shrinking ISR for partition [our.own.topic.two,2] from 1,2,3
> to 1 (kafka.cluster.Partition)
> [2013-08-23 13:17:00,623] ERROR Conditional update of path /brokers/t
> opics/our.own.topic.two/partitions/2/state with d
> ata { "controller_epoch":81, "isr":[ 1 ], "leader":1, "leader_epoch":
> 0, "version":1 } and expected version 10 failed (kafka.utils.ZkUtils$
> )
> org.I0Itec.zkclient.exception.ZkBadVersionException: org.apache.zooke
> eper.KeeperException$BadVersionException: KeeperErrorCode = BadVersion for
> /brokers/topics/our.own.topic.two/partitions/2/state
>         at
> org.I0Itec.zkclient.exception.ZkException.create(ZkException.java:51)
>         at
> org.I0Itec.zkclient.ZkClient.retryUntilConnected(ZkClient.java:685)
>         at org.I0Itec.zkclient.ZkClient.writeData(ZkClient.java:809)
>         at
> kafka.utils.ZkUtils$.conditionalUpdatePersistentPath(ZkUtils.scala:330)
>         at kafka.cluster.Partition.updateIsr(Partition.scala:347)
>         at kafka.cluster.Partition.maybeShrinkIsr(Partition.scala:291)
>         at
> kafka.server.ReplicaManager$$anonfun$kafka$server$ReplicaManager$$maybeShrinkIsr$2.apply(ReplicaManager.scala:285)
>         at
> kafka.server.ReplicaManager$$anonfun$kafka$server$ReplicaManager$$maybeShrinkIsr$2.apply(ReplicaManager.scala:285)
>         at scala.collection.mutable.HashSet.foreach(HashSet.scala:61)
>         at
> kafka.server.ReplicaManager.kafka$server$ReplicaManager$$maybeShrinkIsr(ReplicaManager.scala:285)
>         at
> kafka.server.ReplicaManager$$anonfun$startup$1.apply$mcV$sp(ReplicaManager.scala:108)
>         at kafka.utils.Utils$$anon$2.run(Utils.scala:67)
>         at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>         at
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
>         at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
>         at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
>         at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
>         at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>         at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>         at java.lang.Thread.run(Thread.java:722)
> Caused by: org.apache.zookeeper.KeeperException$BadVersionException:
> KeeperErrorCode = BadVersion for
> /brokers/topics/our.own.topic.two/partitions/2/state
>         at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:106)
>         at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
>         at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1044)
>         at
> org.I0Itec.zkclient.ZkConnection.writeData(ZkConnection.java:111)
>         at org.I0Itec.zkclient.ZkClient$10.call(ZkClient.java:813)
>         at
> org.I0Itec.zkclient.ZkClient.retryUntilConnected(ZkClient.java:675)
>         ... 18 more
>
> Regards,
>
> Libo
>
>