Devaraj K commented on YARN-3857:

Thanks [~mujunchao] for reporting and working in this. I am assigning this 
issue to you.

Adding to [~zxu], Can you also take care of the naming convention for the patch 
like <JIRA-ID>-<patch-version>.patch?

> Memory leak in ResourceManager with SIMPLE mode
> -----------------------------------------------
>                 Key: YARN-3857
>                 URL: https://issues.apache.org/jira/browse/YARN-3857
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.7.0
>            Reporter: mujunchao
>            Assignee: mujunchao
>            Priority: Critical
>         Attachments: hadoop-yarn-server-resourcemanager.patch
>  We register the ClientTokenMasterKey to avoid client may hold an invalid 
> ClientToken after RM restarts. In SIMPLE mode, we register 
> Pair<ApplicationAttemptId, null> ,  But we never remove it from HashMap, as 
> unregister only runing while in Security mode, so memory leak coming. 

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