Daryn Sharp created HDFS-7046:
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             Summary: HA NN can NPE upon transition to active
                 Key: HDFS-7046
                 URL: https://issues.apache.org/jira/browse/HDFS-7046
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.5.0, 3.0.0
            Reporter: Daryn Sharp
            Priority: Critical


While processing edits, the NN may decide after adjusting block totals to leave 
safe mode - in the middle of the edit.  Going active starts the secret manager 
which generates a new secret key, which in turn generates an edit, which NPEs 
because the edit log is not open.

# Transitions should _not_ occur in the middle of an edit.
# The edit log appears to claim it's open for write when the stream isn't even 
open



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