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https://issues.apache.org/jira/browse/HDFS-2798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Li resolved HDFS-2798.
------------------------------
Resolution: Duplicate
Target Version/s: 2.0.0-alpha, 0.23.3, 3.0.0 (was: 0.23.3, 2.0.0-alpha,
3.0.0)
It was fixed in HDFS-2525.
> Append may race with datanode block scanner, causing replica to be
> incorrectly marked corrupt
> ---------------------------------------------------------------------------------------------
>
> Key: HDFS-2798
> URL: https://issues.apache.org/jira/browse/HDFS-2798
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.22.0, 0.23.0
> Reporter: Todd Lipcon
> Assignee: Brandon Li
> Priority: Critical
>
> When a pipeline is setup for append, the block's metadata file is renamed
> before the block is removed from the datanode block scanner queues. This can
> cause a race condition where the block scanner incorrectly marks the block as
> corrupt, since it tries to scan the file corresponding to the old genstamp.
> This causes TestFileAppend2 to time out in extremely rare circumstances - the
> corrupt replica prevents the writer thread from completing the file.
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