[jira] [Created] (HDFS-6601) Issues in finalizing rolling upgrade when there is a layout version change

["Kihwal Lee (JIRA)" <ji...@apache.org>]

Kihwal Lee created HDFS-6601:
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             Summary: Issues in finalizing rolling upgrade when there is a layout version change
                 Key: HDFS-6601
                 URL: https://issues.apache.org/jira/browse/HDFS-6601
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Kihwal Lee
            Assignee: Kihwal Lee


After HDFS-6545, we have noticed a couple of issues.
- The storage dir's VERSION file is not properly updated. This becomes a problem when there is a layout version change.  We can have the finalization do {{storage.writeAll()}}

- {{OP_ROLLING_UPGRADE_FINALIZE}} cannot be replayed, once the corresponding {{OP_ROLLING_UPGRADE_START}} is consumed and a new fsimage is created (e.g. rollback image). On restart, NN terminates complaining it can't finalize something that it didn't start. We can make NN ignore {{OP_ROLLING_UPGRADE_FINALIZE}} if no rolling upgrade is in progress.



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