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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-2617) NM does not need to send finished container whose APP is not running to RM
Date Wed, 01 Oct 2014 20:04:34 GMT

     [ https://issues.apache.org/jira/browse/YARN-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jian He updated YARN-2617:
--------------------------
    Attachment: YARN-2617.5.patch

just added one more log statement myself, pending jenkins

> 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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