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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2824) HA: failover does not succeed if prior NN died just after creating an edit log segment
Date Sat, 21 Jan 2012 22:59:43 GMT
HA: failover does not succeed if prior NN died just after creating an edit log segment
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                 Key: HDFS-2824
                 URL: https://issues.apache.org/jira/browse/HDFS-2824
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ha, name-node
    Affects Versions: HA branch (HDFS-1623)
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


In stress testing failover, I had the following failure:
- NN1 rolls edit logs and starts writing edits_inprogress_1000
- NN1 crashes before writing the START_LOG_SEGMENT transaction
- NN2 tries to become active, and calls {{recoverUnfinalizedSegment}}. Since the log file
contains no valid transactions, it is marked as corrupt and renamed with the {{.corrupt}}
suffix
- The sanity check in {{openLogsForWrite}} will refuse to open a new in-progress log at the
same txid. Failover does not proceed.

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