zhihai xu commented on YARN-4201:

Thanks for the new patch [~hex108], I think it will be better to check 
{{scheduler.getSchedulerNode(nodeId)}} not null to avoid NPE.
If {{scheduler.getSchedulerNode(nodeId)}} return null, it means the blacklisted 
node is just removed from scheduler, I think it will be ok to not add a removed 
node to black List.

> AMBlacklist does not work for minicluster
> -----------------------------------------
>                 Key: YARN-4201
>                 URL: https://issues.apache.org/jira/browse/YARN-4201
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Jun Gong
>            Assignee: Jun Gong
>         Attachments: YARN-4021.001.patch, YARN-4201.002.patch
> For minicluster (scheduler.include-port-in-node-name is set to TRUE), 
> AMBlacklist does not work. It is because RM just puts host to AMBlacklist 
> whether scheduler.include-port-in-node-name is set or not. In fact RM should 
> put "host + port" to AMBlacklist when it is set.

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