Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-9559

When metrics system is restarted MBean names get incorrectly flagged as dupes

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.4.0, 3.0.0-alpha1
    • Fix Version/s: 2.5.0
    • Component/s: metrics
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      In the Metrics2 system, every source gets registered as an MBean name, which gets put into a unique name pool in the singleton DefaultMetricsSystem object. The problem is that when the metrics system is shutdown (which unregisters the MBeans) this unique name pool is left as is, so if the metrics system is started again every attempt to register the same MBean names fails (exception is eaten and a warning is logged).
      I think the fix here is to remove the name from the unique name pool if an MBean is unregistered, since it's OK at this point to add it again.

        Attachments

        1. HADOOP-9559.patch
          4 kB
          Mostafa Elhemali
        2. HADOOP-9559.2.patch
          5 kB
          Mike Liddell

          Issue Links

            Activity

              People

              • Assignee:
                mikeliddell Mike Liddell
                Reporter:
                mostafae Mostafa Elhemali
              • Votes:
                0 Vote for this issue
                Watchers:
                7 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: