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  1. Hadoop HDFS
  2. HDFS-8883

NameNode Metrics : Add FSNameSystem lock Queue Length

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.7.1
    • Fix Version/s: 2.8.0, 2.7.4, 3.0.0-alpha1
    • Component/s: namenode
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      FSNameSystemLock can have contention when NameNode is under load. This patch adds LockQueueLength – the number of threads waiting on FSNameSystemLock – as a metric in NameNode.

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              • Assignee:
                anu Anu Engineer
                Reporter:
                anu Anu Engineer
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                • Created:
                  Updated:
                  Resolved: