I've seen this problem now too with 0.8.2.1.  It happened after we had a
disk failure (but the server failed to shutdown:  KAFKA-2222).  After that
happened, subsequently, several ISR's underwent I think 'unclean leader
election', but I'm not 100% sure. But I did see lots of those same error
messages: "Cached zkVersion [X] not equal to that in zookeeper, skip
updating ISR...".

So, I don't know that the issue was fixed in 0.8.1.1.

Can you describe the circumstances for the errors you saw?

Jason

On Fri, May 29, 2015 at 12:17 AM, chenlax <lax...@hotmail.com> wrote:

> kafka version =0.8.1.1
>
>  i get the error log as follow:
>
> INFO Partition [Topic_Beacon_1,10] on broker 4: Shrinking ISR for
> partition [Topic_Beacon_1,10] from 4,7 to 4 (kafka.cluster.Partition)
> ERROR Conditional update of path
> /brokers/topics/Topic_Beacon_1/partitions/10/state with data
> {"controller_epoch":16,"leader":4,"version":1,"leader_epoch":7,"isr":[4]}
> and expecte
> d version 5032 failed due to
> org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
> BadVersion for /brokers/topics/Topic_Beacon_1/partitions/10/state
> (kafka.utils.ZkUtils$)
> INFO Partition [Topic_Beacon_1,10] on broker 4: Cached zkVersion [5032]
> not equal to that in zookeeper, skip updating ISR (kafka.cluster.Partition)
>
>
> Only restart broker,the issue will fix, why the broker can not back to ISR
> for partition?
>
> and i find the same issue,
> http://mail-archives.apache.org/mod_mbox/kafka-users/201404.mbox/%3CCAHwHRrW_vKsSpoAnhEqQUZVBT5_Djx3qbixsH8=6hAe=vg4...@mail.gmail.com%3E
>
> it point out kafka_0.8.1.1 fix the bug,so i want to know, what causes this
> problem.
>
>
> Thanks,
> Lax
>

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