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  1. HBase
  2. HBASE-5926

Delete the master znode after a master crash

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 0.95.2
    • Fix Version/s: 0.95.0
    • Component/s: master, scripts
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      This is the continuation of the work done in HBASE-5844.
      But we can't apply exactly the same strategy: for the region server, there is a znode per region server, while for the master & backup master there is a single znode for both.

      So if we apply the same strategy as for a regionserver, we may have this scenario:
      1) Master starts
      2) Backup master starts
      3) Master dies
      4) ZK detects it
      5) Backup master receives the update from ZK
      6) Backup master creates the new master node and become the main master
      7) Previous master script continues
      8) Previous master script deletes the master node in ZK
      9) => issue: we deleted the node just created by the new master

      This should not happen often (usually the znode will be deleted soon enough), but it can happen.

        Attachments

        1. 5926.v9.patch
          18 kB
          Nicolas Liochon
        2. 5926.v8.patch
          18 kB
          Nicolas Liochon
        3. 5926.v6.patch
          13 kB
          Nicolas Liochon
        4. 5926.v14.patch
          19 kB
          Nicolas Liochon
        5. 5926.v13.patch
          19 kB
          Nicolas Liochon
        6. 5926.v11.patch
          14 kB
          Nicolas Liochon
        7. 5926.v10.patch
          13 kB
          Nicolas Liochon

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              • Assignee:
                nkeywal Nicolas Liochon
                Reporter:
                nkeywal Nicolas Liochon
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                Dates

                • Created:
                  Updated:
                  Resolved: