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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2617) NM does not need to send finished container whose APP is not running to RM
Date Wed, 01 Oct 2014 22:47:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14155715#comment-14155715
] 

Hadoop QA commented on YARN-2617:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12672391/YARN-2617.5.patch
  against trunk revision dd1b8f2.

    {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}.  There were no new javadoc warning messages.

    {color:red}-1 eclipse:eclipse{color}.  The patch failed to build with eclipse:eclipse.

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

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

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

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

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/5212//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/5212//console

This message is automatically generated.

> NM does not need to send finished container whose APP is not running to RM
> --------------------------------------------------------------------------
>
>                 Key: YARN-2617
>                 URL: https://issues.apache.org/jira/browse/YARN-2617
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: Jun Gong
>            Assignee: Jun Gong
>             Fix For: 2.6.0
>
>         Attachments: YARN-2617.2.patch, YARN-2617.3.patch, YARN-2617.4.patch, YARN-2617.5.patch,
YARN-2617.patch
>
>
> We([~chenchun]) are testing RM work preserving restart and found the following logs when
we ran a simple MapReduce task "PI". NM continuously reported completed containers whose Application
had already finished while AM had finished. 
> {code}
> 2014-09-26 17:00:42,228 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> 2014-09-26 17:00:42,228 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> 2014-09-26 17:00:43,230 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> 2014-09-26 17:00:43,230 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> 2014-09-26 17:00:44,233 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> 2014-09-26 17:00:44,233 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Null container completed...
> {code}
> In the patch for YARN-1372, ApplicationImpl on NM should guarantee to  clean up already
completed applications. But it will only remove appId from  'app.context.getApplications()'
when ApplicaitonImpl received evnet 'ApplicationEventType.APPLICATION_LOG_HANDLING_FINISHED'
, however NM might receive this event for a long time or could not receive. 
> * For NonAggregatingLogHandler, it wait for YarnConfiguration.NM_LOG_RETAIN_SECONDS which
is 3 * 60 * 60 sec by default, then it will be scheduled to delete Application logs and send
the event.
> * For LogAggregationService, it might fail(e.g. if user does not have HDFS write permission),
and it will not send the event.



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