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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2942) Aggregated Log Files should be combined
Date Wed, 18 Feb 2015 23:41:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-2942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326744#comment-14326744
] 

Hadoop QA commented on YARN-2942:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12699570/CombinedAggregatedLogsProposal_v3.pdf
  against trunk revision 9a3e292.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-YARN-Build/6662//console

This message is automatically generated.

> Aggregated Log Files should be combined
> ---------------------------------------
>
>                 Key: YARN-2942
>                 URL: https://issues.apache.org/jira/browse/YARN-2942
>             Project: Hadoop YARN
>          Issue Type: New Feature
>    Affects Versions: 2.6.0
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>         Attachments: CombinedAggregatedLogsProposal_v3.pdf, CompactedAggregatedLogsProposal_v1.pdf,
CompactedAggregatedLogsProposal_v2.pdf, YARN-2942-preliminary.001.patch, YARN-2942-preliminary.002.patch,
YARN-2942.001.patch, YARN-2942.002.patch, YARN-2942.003.patch
>
>
> Turning on log aggregation allows users to easily store container logs in HDFS and subsequently
view them in the YARN web UIs from a central place.  Currently, there is a separate log file
for each Node Manager.  This can be a problem for HDFS if you have a cluster with many nodes
as you’ll slowly start accumulating many (possibly small) files per YARN application.  The
current “solution” for this problem is to configure YARN (actually the JHS) to automatically
delete these files after some amount of time.  
> We should improve this by compacting the per-node aggregated log files into one log file
per application.



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