Details
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Bug
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Status: Resolved
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Major
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Resolution: Implemented
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3.3.1
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None
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None
Description
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.
Attachments
Attachments
Issue Links
- relates to
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ZOOKEEPER-934 Add sanity check for server ID
- Open
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ZOOKEEPER-880 QuorumCnxManager$SendWorker grows without bounds
- Closed