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https://issues.apache.org/jira/browse/KAFKA-2729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15025008#comment-15025008
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Iskandarov Eduard commented on KAFKA-2729:
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Our kafka cluster met the same issue:
{noformat}
kafka2 1448388319:093 [2015-11-24 21:05:19,387] INFO Partition
[dstat_wc_cpl_log,13] on broker 2: Shrinking ISR for partition
[dstat_wc_cpl_log,13] from 2,1 to 2 (kafka.cluster.Partition)
kafka2 1448388319:094 [2015-11-24 21:05:19,404] INFO Partition
[dstat_wc_cpl_log,13] on broker 2: Cached zkVersion [332] not equal to that in
zookeeper, skip updating ISR (kafka.cluster.Partition)
{noformat}
We use confluent.io's kafka distribution.
Kafka version is 0.8.2.2.
> Cached zkVersion not equal to that in zookeeper, broker not recovering.
> -----------------------------------------------------------------------
>
> Key: KAFKA-2729
> URL: https://issues.apache.org/jira/browse/KAFKA-2729
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.8.2.1
> Reporter: Danil Serdyuchenko
>
> After a small network wobble where zookeeper nodes couldn't reach each other,
> we started seeing a large number of undereplicated partitions. The zookeeper
> cluster recovered, however we continued to see a large number of
> undereplicated partitions. Two brokers in the kafka cluster were showing this
> in the logs:
> {code}
> [2015-10-27 11:36:00,888] INFO Partition
> [__samza_checkpoint_event-creation_1,3] on broker 5: Shrinking ISR for
> partition [__samza_checkpoint_event-creation_1,3] from 6,5 to 5
> (kafka.cluster.Partition)
> [2015-10-27 11:36:00,891] INFO Partition
> [__samza_checkpoint_event-creation_1,3] on broker 5: Cached zkVersion [66]
> not equal to that in zookeeper, skip updating ISR (kafka.cluster.Partition)
> {code}
> For all of the topics on the effected brokers. Both brokers only recovered
> after a restart. Our own investigation yielded nothing, I was hoping you
> could shed some light on this issue. Possibly if it's related to:
> https://issues.apache.org/jira/browse/KAFKA-1382 , however we're using
> 0.8.2.1.
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