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https://issues.apache.org/jira/browse/YARN-4165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904577#comment-14904577
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MENG DING commented on YARN-4165:
---------------------------------

I think this is expected behavior according to the current scheduling logic. 
Assuming resource usage of the app has not gone over user/queue limit, then 
because of the starvation of the application, the scheduler will keep reserving 
containers for unsatisfied requests.

> An outstanding container request makes all nodes to be reserved causing all 
> jobs pending
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4165
>                 URL: https://issues.apache.org/jira/browse/YARN-4165
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacity scheduler, resourcemanager, scheduler
>    Affects Versions: 2.7.1
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>
> We have a long running service in YARN, it has a outstanding container 
> request that YARN cannot satisfy (require more memory that nodemanager can 
> supply). Then YARN reserves all nodes for this application, when I submit 
> other jobs (require relative small memory that nodemanager can supply), all 
> jobs are pending because YARN skips scheduling containers on the nodes that 
> have been reserved.



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