Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-8883

NameNode Metrics : Add FSNameSystem lock Queue Length

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.7.1
    • 2.8.0, 2.7.4, 3.0.0-alpha1
    • namenode
    • None
    • 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.

      Attachments

        1. HDFS-8883.001.patch
          8 kB
          Anu Engineer

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. HDFS-8915 TestFSNamesystem.testFSLockGetWaiterCount fails intermittently in jenkins

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-9145 Tracking methods that hold FSNamesystemLock for too long

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              aengineer Anu Engineer
              aengineer Anu Engineer
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: