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https://issues.apache.org/jira/browse/YARN-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788203#comment-13788203
 ] 

Hadoop QA commented on YARN-1130:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12607156/YARN-1130.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 
warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 
eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient
 hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common:

                  org.apache.hadoop.mapred.TestJobCleanup

                                      The following test timeouts occurred in 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient
 hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common:

org.apache.hadoop.mapreduce.v2.TestUberAM

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: 
https://builds.apache.org/job/PreCommit-YARN-Build/2136//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/2136//console

This message is automatically generated.

> Improve the log flushing for tasks when mapred.userlog.limit.kb is set
> ----------------------------------------------------------------------
>
>                 Key: YARN-1130
>                 URL: https://issues.apache.org/jira/browse/YARN-1130
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.0.5-alpha
>            Reporter: Paul Han
>            Assignee: Paul Han
>             Fix For: 2.0.5-alpha
>
>         Attachments: YARN-1130.patch, YARN-1130.patch, YARN-1130.patch
>
>
> When userlog limit is set with something like this:
> {code}
> <property>
> <name>mapred.userlog.limit.kb</name>
> <value>2048</value>
> <description>The maximum size of user-logs of each task in KB. 0 disables the 
> cap.
> </description>
> </property>
> {code}
> the log entry will be truncated randomly for the jobs.
> The log size is left between 1.2MB to 1.6MB.
> Since the log is already limited, avoid the log truncation is crucial for 
> user.
> The other issue with the current 
> impl(org.apache.hadoop.yarn.ContainerLogAppender) is that log entries will 
> not flush to file until the container shutdown and logmanager close all 
> appenders. If user likes to see the log during task execution, it doesn't 
> support it.
> Will propose a patch to add a flush mechanism and also flush the log when 
> task is done.  



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