Hadoop HDFS
  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 Sub-task
    • Status: Resolved
    • Priority: Major 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.

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

        Activity

        Aaron T. Myers created issue -
        Todd Lipcon made changes -
        Field Original Value New Value
        Assignee Aaron T. Myers [ atm ] Todd Lipcon [ tlipcon ]
        Todd Lipcon made changes -
        Attachment hdfs-2794.txt [ 12513399 ]
        Todd Lipcon made changes -
        Attachment hdfs-2794.txt [ 12513510 ]
        Todd Lipcon made changes -
        Status Open [ 1 ] Resolved [ 5 ]
        Hadoop Flags Reviewed [ 10343 ]
        Fix Version/s HA branch (HDFS-1623) [ 12317568 ]
        Resolution Fixed [ 1 ]

          People

          • Assignee:
            Todd Lipcon
            Reporter:
            Aaron T. Myers
          • Votes:
            0 Vote for this issue
            Watchers:
            7 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

              Development