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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-8459) Capacity Scheduler should properly handle container allocation on app/node when app/node being removed by scheduler
Date Tue, 26 Jun 2018 00:03:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-8459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wangda Tan updated YARN-8459:
-----------------------------
    Attachment: YARN-8459.001.patch

> Capacity Scheduler should properly handle container allocation on app/node when app/node
being removed by scheduler
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-8459
>                 URL: https://issues.apache.org/jira/browse/YARN-8459
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>    Affects Versions: 3.1.0
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>            Priority: Blocker
>         Attachments: YARN-8459.001.patch
>
>
> Thanks [~gopalv] for reporting this issue. 
> In async mode, capacity scheduler can allocate/reserve containers on node/app when node/app
is being removed ({{doneApplicationAttempt}}/{{removeNode}}).
> This will cause some issues, for example.
> a. Container for app_1 reserved on node_x.
> b. At the same time, app_1 is being removed.
> c. Reserve on node operation finished after app_1 removed ({{doneApplicationAttempt}}).

> For all the future runs, the node_x is completely blocked by the invalid reservation.
It keep reporting "Trying to schedule for a finished app, please double check" for the node_x.
> We need a fix to make sure this won't happen.



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