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From "zhangshilong (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (YARN-7214) duplicated container completed To AM
Date Tue, 19 Sep 2017 09:39:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171396#comment-16171396
] 

zhangshilong edited comment on YARN-7214 at 9/19/17 9:38 AM:
-------------------------------------------------------------

!screenshot-1.png!
generally,
1、 NM complete one container(c) and send to RM
2、RM sent c to AM, tell AM c is completed.
3、RM sent c to NM, tell NM c can be removed from NM.
If RM restart before step 3,  c will be duplicated container completed to AM.


was (Author: zsl2007):
!screenshot-1.png!
generally,
1、 NM complete one container(c) and send to RM
2、RM sent c to AM, tell AM c is completed.
3、RM sent c to NM, tell NM c can be removed from NM.
If RM restart before step 3, c will be in in context of NM for ever. 
If RM restart again, c will be duplicated container completed to AM.

> duplicated container completed To AM
> ------------------------------------
>
>                 Key: YARN-7214
>                 URL: https://issues.apache.org/jira/browse/YARN-7214
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.1, 3.0.0-alpha3
>         Environment: hadoop 2.7.1  rm recovery and nm recovery enabled
>            Reporter: zhangshilong
>         Attachments: screenshot-1.png
>
>
> env: hadoop 2.7.1  with rm recovery and nm recovery enabled
> case:
>  spark app(app1) running least one container(named c1) in NM1.
>  1、NM1 crashed,and RM found NM1 expired in 10 minutes.
>  2、RM will remove all containers in NM1(RMNodeImpl). and  app1 will receive c1 completed
message.But RM can not send c1(to be removed) to NM1 because NM1 lost.
>  3、NM1 restart and register with RM(c1 in register request),but RM found NM1 is lost
and will not handle containers from NM1.
> 4、NM1 will not heartbeat with c1(c1 not in heartbeat request).  So c1 will not removed
from context of NM1.
> 5、 RM restart, NM1 re register with RM。And c1 will be handled and recovered. RM
will send c1 complted message to AM of app1.  So, app1 received duplicated c1. 
> once spark AM   receive one container completed from RM, it will allocate one new container.



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