[jira] [Resolved] (KAFKA-479) ZK EPoll taking 100% CPU usage with Kafka Client

["Jay Kreps (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-479?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jay Kreps resolved KAFKA-479.
-----------------------------
    Resolution: Invalid

I think we decided this was a java bug.

> ZK EPoll taking 100% CPU usage with Kafka Client
> ------------------------------------------------
>
>                 Key: KAFKA-479
>                 URL: https://issues.apache.org/jira/browse/KAFKA-479
>             Project: Kafka
>          Issue Type: Bug
>         Environment: java 1.6.0_21
> Kafka 0.7.14
>            Reporter: Chris Riccomini
>            Priority: Blocker
>         Attachments: java.hprof.txt, java.hprof.txt, kafka.log
>
>
> Hey Guys,
> I'm seeing a very strange bug after I upgraded to Kafka 0.7.14. On my consumer side, the process seems to run with very high CPU usage. I turned on HPROF, and it's showing that 75% of the CPU usage is going to Java's NIO EPoll/select calls.
> There are supposedly work arounds that Mina and a few others employ. This seems like more of a ZK bug- have you guys seen this before?
> Any ideas?



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