[jira] [Created] (HBASE-11726) Master should fail-safe if starting with a pre 0.96 layout

["Esteban Gutierrez (JIRA)" <ji...@apache.org>]

Esteban Gutierrez created HBASE-11726:
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             Summary: Master should fail-safe if starting with a pre 0.96 layout
                 Key: HBASE-11726
                 URL: https://issues.apache.org/jira/browse/HBASE-11726
             Project: HBase
          Issue Type: Bug
          Components: master
    Affects Versions: 0.98.5, 0.96.2, 0.99.0, 2.0.0
            Reporter: Esteban Gutierrez
            Assignee: Esteban Gutierrez
            Priority: Critical


We recently saw this: If user inadvertently starts the HBase Master after deploying new HBase binaries (any version that supports namespaces), the HMaster will start the migration to PBs the the {{hbase.version}} file per HBASE-5453 and that will write a new version file PB-serialized but with the old version number. Further restarts of the master will fail because the hbase version file has been migrated to PBs and there will be version mismatch. The right approach should be to fail safe the master if we find an old {{hbase.version}} file in order to force user to run upgrade tool.



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