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  1. Hadoop HDFS
  2. HDFS-3990

NN's health report has severe performance problems

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
    • 2.0.3-alpha, 0.23.5
    • namenode
    • 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.branch-0.23.patch
          12 kB
          Daryn Sharp
        2. HDFS-3990.branch-0.23.patch
          13 kB
          Daryn Sharp
        3. HDFS-3990.patch
          9 kB
          Daryn Sharp
        4. HDFS-3990.patch
          9 kB
          Daryn Sharp
        5. HDFS-3990.patch
          10 kB
          Daryn Sharp
        6. HDFS-3990.patch
          12 kB
          Daryn Sharp
        7. HDFS-3990.patch
          11 kB
          Daryn Sharp
        8. HDFS-3990.patch
          11 kB
          Daryn Sharp
        9. HDFS-3990.patch
          13 kB
          Daryn Sharp
        10. HDFS-3990.patch
          10 kB
          Daryn Sharp
        11. hdfs-3990.txt
          13 kB
          Eli Collins
        12. hdfs-3990.txt
          4 kB
          Eli Collins

        Issue Links

          breaks

          Bug - A problem which impairs or prevents the functions of the product. HDFS-4269 DatanodeManager#registerDatanode rejects all datanode registrations from localhost in single-node developer setup

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-5338 Add a conf to disable hostname check in DN registration

          • Major - Major loss of function.
          • Closed
          relates to

          Sub-task - The sub-task of the issue HDFS-4702 remove namesystem lock from DatanodeManager#fetchDatanodes

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-3998 Speed up fsck

          • Major - Major loss of function.
          • Open
          requires

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-4068 DatanodeID and DatanodeInfo member should be private

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

          Activity

            People

              daryn Daryn Sharp
              daryn Daryn Sharp
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              Dates

                Created:
                Updated:
                Resolved: