Tsuyoshi OZAWA commented on YARN-2800:

[~leftnoteasy], Thanks for your clarification. Essentially, the configurations 
about labels are a part of RM's state. IMHO, we should move the essential 
configuration onto RMStateStore to prevent the mismatch ideally. I think ZK can 
handle it since frequency of updating labels is not so high and number of 
labels are not so large. cc: [~jianhe], [~kkambatl], what do you think?

> Should print WARN log in both RM/RMAdminCLI side when 
> MemoryRMNodeLabelsManager is enabled
> ------------------------------------------------------------------------------------------
>                 Key: YARN-2800
>                 URL: https://issues.apache.org/jira/browse/YARN-2800
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: client, resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         Attachments: YARN-2800-20141102-1.patch, YARN-2800-20141102-2.patch
> Even though we have documented this, but it will be better to explicitly 
> print a message in both RM/RMAdminCLI side to explicitly say that the node 
> label being added will be lost across RM restart.

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