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https://issues.apache.org/jira/browse/HDFS-2824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196490#comment-13196490
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Todd Lipcon commented on HDFS-2824:
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+1, thanks for the explanation
> HA: failover does not succeed if prior NN died just after creating an edit
> log segment
> --------------------------------------------------------------------------------------
>
> 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: Aaron T. Myers
> Attachments: HDFS-2824-HDFS-1623.patch, HDFS-2824-HDFS-1623.patch
>
>
> 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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