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Posted to mapreduce-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2019/08/01 21:30:00 UTC
[jira] [Commented] (MAPREDUCE-7187)
RMContainerAllocator.ScheduledRequests#getContainerReqToReplace may not
find a task when the priority of container is PRIORITY_MAP
[ https://issues.apache.org/jira/browse/MAPREDUCE-7187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16898372#comment-16898372 ]
Wei-Chiu Chuang commented on MAPREDUCE-7187:
--------------------------------------------
[~jiwq] can you help review the patch?
> RMContainerAllocator.ScheduledRequests#getContainerReqToReplace may not find a task when the priority of container is PRIORITY_MAP
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7187
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7187
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster
> Affects Versions: 2.7.5, 3.1.1, 2.9.2
> Reporter: Zhizhen Hou
> Priority: Major
> Attachments: MAPREDUCE-7187.001.patch
>
>
> The resource manager may has allocated a map container on a host ("h1" for example) for a application, and the container has not been fetched by the MRAppMaster. At this time, the MRAppMaster receives a task fail event, and the task is on host h1. The event cause the h1 blacklisted. Now the MRAppMaster send a heartbeat, and receive a container on h1. The MRAppMaster can not assign the container since it is on a blacklisted host. The #getContainerReqToReplace fails returning another task, may cause a map task hang forever.
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