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https://issues.apache.org/jira/browse/HDFS-137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HDFS-137.
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Resolution: Fixed
This has likely been fixed by now.
> DataNode should clean up temporary files when writeBlock fails.
> ---------------------------------------------------------------
>
> Key: HDFS-137
> URL: https://issues.apache.org/jira/browse/HDFS-137
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Raghu Angadi
>
> Once a datanode starts receiving a block and if it fails to complete
> receiving the block, it leaves the temporary block files in the temp
> directory. Because of this, same block can not be written to this node for
> next one hour.
> DataNode should really delete these files and allow the next attempt.
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