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https://issues.apache.org/jira/browse/ZOOKEEPER-883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916561#action_12916561
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Lars George commented on ZOOKEEPER-883:
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Yes, did request that and will update here as I get details.
> Idle cluster increasingly consumes CPU resources
> ------------------------------------------------
>
> Key: ZOOKEEPER-883
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-883
> Project: Zookeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.3.1
> Reporter: Lars George
> Attachments: Archive.zip
>
>
> Monitoring the ZooKeeper nodes by polling the various ports using Nagios'
> open port checks seems to cause a substantial raise of CPU being used by the
> ZooKeeper daemons. Over the course of a week an idle cluster grew from a
> baseline 2% to >10% CPU usage. Attached is a stack dump and logs showing the
> occupied threads. At the end the daemon starts failing on "too many open
> files" errors as all handles are used up.
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