[jira] Resolved: (ZOOKEEPER-287) high cpu utilization caused by nioserver factory thread

["Patrick Hunt (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Hunt resolved ZOOKEEPER-287.
------------------------------------

    Resolution: Duplicate

No further reports of this issue - closing as duplicate - fixed in ZOOKEEPER-427

> high cpu utilization caused by nioserver factory thread
> -------------------------------------------------------
>
>                 Key: ZOOKEEPER-287
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-287
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.0.1
>         Environment: Linux 2.6.9-67.ELsmp #1 SMP Wed Nov 7 13:58:04 EST 2007 i686 i686 i386 GNU/Linux
> the servers were running in vmware vms
> java version "1.6.0_06"
> Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
> Java HotSpot(TM) Client VM (build 10.0-b22, mixed mode)
>            Reporter: Patrick Hunt
>            Priority: Critical
>             Fix For: 3.3.0
>
>
> a user reported that a long running server, part of a 2 server ensemble, started using 100%cpu (1 server of the ensemble, the other was fine).
> mahadev tracked it down to a thread in the server running epoll in a tight loop - the thread was the nio server factory thread that selects on client fds.

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