Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-3990

NN's health report has severe performance problems

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
    • Fix Version/s: 2.0.3-alpha, 0.23.5
    • Component/s: namenode
    • Labels:
      None

      Description

      The dfshealth page will place a read lock on the namespace while it does a dns lookup for every DN. On a multi-thousand node cluster, this often results in 10s+ load time for the health page. 10 concurrent requests were found to cause 7m+ load times during which time write operations blocked.

        Attachments

        1. hdfs-3990.txt
          4 kB
          Eli Collins
        2. hdfs-3990.txt
          13 kB
          Eli Collins
        3. HDFS-3990.patch
          10 kB
          Daryn Sharp
        4. HDFS-3990.patch
          13 kB
          Daryn Sharp
        5. HDFS-3990.patch
          11 kB
          Daryn Sharp
        6. HDFS-3990.patch
          11 kB
          Daryn Sharp
        7. HDFS-3990.patch
          12 kB
          Daryn Sharp
        8. HDFS-3990.patch
          10 kB
          Daryn Sharp
        9. HDFS-3990.patch
          9 kB
          Daryn Sharp
        10. HDFS-3990.patch
          9 kB
          Daryn Sharp
        11. HDFS-3990.branch-0.23.patch
          13 kB
          Daryn Sharp
        12. HDFS-3990.branch-0.23.patch
          12 kB
          Daryn Sharp

          Issue Links

            Activity

              People

              • Assignee:
                daryn Daryn Sharp
                Reporter:
                daryn Daryn Sharp
              • Votes:
                0 Vote for this issue
                Watchers:
                22 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: