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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-448) Remove unnecessary hflush from log aggregation
Date Tue, 05 Mar 2013 13:05:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13593379#comment-13593379
] 

Hudson commented on YARN-448:
-----------------------------

Integrated in Hadoop-Hdfs-trunk #1335 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1335/])
    YARN-448. Remove unnecessary hflush from log aggregation (Kihwal Lee via bobby) (Revision
1452475)

     Result = SUCCESS
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1452475
Files : 
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java

                
> 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
>             Fix For: 3.0.0, 0.23.7, 2.0.4-beta
>
>         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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