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https://issues.apache.org/jira/browse/HADOOP-3574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652626#action_12652626
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Tsz Wo (Nicholas), SZE commented on HADOOP-3574:
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> ... since this Datanode is already in bad state.. we can not expect it to do
> much.
Theoretically, the out-of-space datanode should be able to send an error code
to other parties since the bad state is about out of disk space, not network
problems. However, implementing this might be hard.
> Better Datanode DiskOutOfSpaceException handling.
> -------------------------------------------------
>
> Key: HADOOP-3574
> URL: https://issues.apache.org/jira/browse/HADOOP-3574
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
>
> When a datanode ran out of disk space, it throws DiskOutOfSpaceException
> internally. However, it does not notify the writing client about the
> exception. As a result, the client will wait until socket timeout.
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