[jira] [Commented] (YARN-2942) Aggregated Log Files should be combined

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-2942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393450#comment-14393450 ] 

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/12709065/ConcatableAggregatedLogsProposal_v4.pdf
  against trunk revision 6a6a59d.

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

Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7204//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, ConcatableAggregatedLogsProposal_v4.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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