jaehoon ko updated YARN-4260:
    Attachment: YARN-4260.003.patch

patch against 40cac59248f17c59fc819f4145cdeac9db309626 (current trunk)

> Check NodeManager's validity based on hostname(IP) and port
> -----------------------------------------------------------
>                 Key: YARN-4260
>                 URL: https://issues.apache.org/jira/browse/YARN-4260
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.7.1
>            Reporter: jaehoon ko
>         Attachments: YARN-4260.001.patch, YARN-4260.002.patch, 
> YARN-4260.003.patch
> There can be situations where multiple NMs are running on the same host; 
> emulating multi-host YARN cluster on one host, deploying dockerized NMs that 
> share network stack. In such cases, RM should be able to distinguish NMs 
> running on the same host. However, current implementation checks validity of 
> NM based only on hostname (NodesListManager.isValidNode()). So it is not 
> possible to distinguish a specific NM from other NMs on the same host.

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