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  1. Hadoop HDFS
  2. HDFS-1623 High Availability Framework for HDFS NN
  3. HDFS-2794

HA: Active NN may purge edit log files before standby NN has a chance to read them

    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: HA branch (HDFS-1623)
    • Fix Version/s: HA branch (HDFS-1623)
    • Component/s: ha, namenode
    • Labels:
      None

      Description

      Given that the active NN is solely responsible for purging finalized edit log segments, and given that the active NN has no way of knowing when the standby reads edit logs, it's possible that the standby NN could fail to read all edits it needs before the active purges the files.

        Attachments

        1. hdfs-2794.txt
          9 kB
          Todd Lipcon
        2. hdfs-2794.txt
          9 kB
          Todd Lipcon

          Activity

            People

            • Assignee:
              tlipcon Todd Lipcon
              Reporter:
              atm Aaron T. Myers
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              Dates

              • Created:
                Updated:
                Resolved: