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https://issues.apache.org/jira/browse/HDFS-788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HDFS-788.
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Resolution: Fixed
This has likely been fixed.
> Datanode behaves badly when one disk is very low on space
> ---------------------------------------------------------
>
> Key: HDFS-788
> URL: https://issues.apache.org/jira/browse/HDFS-788
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Todd Lipcon
>
> FSDataset.getNextVolume() uses FSVolume.getAvailable() to determine whether
> to allocate a block on a volume. This doesn't factor in other in-flight
> blocks that have been "promised" space on the volume. The resulting issue is
> that, if a volume is nearly full but not full, multiple blocks will be
> allocated on that volume, and then they will all hit "Out of space" errors
> during the write.
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