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https://issues.apache.org/jira/browse/HADOOP-2863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571135#action_12571135
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dhruba borthakur commented on HADOOP-2863:
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+1 for the latest version of this patch.
> FSDataOutputStream should not flush() inside close().
> -----------------------------------------------------
>
> Key: HADOOP-2863
> URL: https://issues.apache.org/jira/browse/HADOOP-2863
> Project: Hadoop Core
> Issue Type: Bug
> Components: fs
> Reporter: Raghu Angadi
> Assignee: Raghu Angadi
> Attachments: HADOOP-2863.patch, HADOOP-2863.patch
>
>
> Why does FSDataOutputStream.close() call flush()? This stream itself does not
> store any data that it needs to flush. It is a wrapper and it should just
> invoke its outputstream's close().
> For. e.g one bad side effect is that, in the case of DFSOutputStream which
> extends FSOutputSummer, flush() inside close sends the current data even
> though FSOutputSummer might have some data.. this left over data will be sent
> in side close() (so it sends data in two different packets instead of one).
> Other filesystems might have similar side effects.
> I will submit a patch.
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