Hadoop Common
  1. Hadoop Common
  2. HADOOP-7454 Common side of High Availability Framework (HDFS-1623)
  3. HADOOP-7896

HA: if both NNs are in Standby mode, client needs to try failing back and forth several times with sleeps

    Details

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

      Description

      For a manual failover, there may be an intermediate state for a non-trivial amount of time where both NNs are in standby mode. Currently, the failover proxy will immediately failover on receiving this exception from the first NN, and when it hits the same exception on the second NN, it immediately fails. It should probably fail back and forth nearly indefinitely if both NNs are in Standby mode.

      1. HADOOP-7896-HDFS-1623.patch
        17 kB
        Aaron T. Myers
      2. HADOOP-7896-HDFS-1623.patch
        17 kB
        Aaron T. Myers
      3. HADOOP-7896-HDFS-1623.patch
        14 kB
        Aaron T. Myers

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

              • Created:
                Updated:
                Resolved:

                Development