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https://issues.apache.org/jira/browse/YARN-448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592491#comment-13592491
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Kihwal Lee commented on YARN-448:
---------------------------------
Test not included since it does not affect normal cases. Even in failure cases,
no current error handling in log aggregation is affected by the existence or
absence of version record in a log that failed during aggregation.
> Remove unnecessary hflush from log aggregation
> ----------------------------------------------
>
> Key: YARN-448
> URL: https://issues.apache.org/jira/browse/YARN-448
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 0.23.7, 2.0.4-beta
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: yarn-448.patch.txt
>
>
> AggregatedLogFormat#writeVersion() calls hflush() after writing the version.
> Calling hflush does not seem to be necessary. It can add a lot of load to
> hdfs in a big busy cluster.
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