Hadoop Common
  1. Hadoop Common
  2. HADOOP-8163

Improve ActiveStandbyElector to provide hooks for fencing old active

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.3, 0.24.0
    • Fix Version/s: 2.0.0-alpha
    • Component/s: ha
    • Labels:
      None

      Description

      When a new node becomes active in an HA setup, it may sometimes have to take fencing actions against the node that was formerly active. This JIRA extends the ActiveStandbyElector which adds an extra non-ephemeral node into the ZK directory, which acts as a second copy of the active node's information. Then, if the active loses its ZK session, the next active to be elected may easily locate the unfenced node to take the appropriate actions.

      1. hadoop-8163.txt
        33 kB
        Todd Lipcon
      2. hadoop-8163.txt
        49 kB
        Todd Lipcon
      3. hadoop-8163.txt
        51 kB
        Todd Lipcon
      4. hadoop-8163.txt
        51 kB
        Todd Lipcon
      5. hadoop-8163.txt
        52 kB
        Todd Lipcon

        Activity

          People

          • Assignee:
            Todd Lipcon
            Reporter:
            Todd Lipcon
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            Dates

            • Created:
              Updated:
              Resolved:

              Development