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  1. ZooKeeper
  2. ZOOKEEPER-883

Idle cluster increasingly consumes CPU resources

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Implemented
    • 3.3.1
    • None
    • server
    • 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

        1. Archive.zip
          273 kB
          Lars George

        Issue Links

          relates to

          Sub-task - The sub-task of the issue ZOOKEEPER-934 Add sanity check for server ID

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. ZOOKEEPER-880 QuorumCnxManager$SendWorker grows without bounds

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed

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              Unassigned Unassigned
              larsgeorge Lars George
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              Dates

                Created:
                Updated:
                Resolved: