Junping Du commented on YARN-3019:

bq. The final goal is to support work-preserving recovery only. So the config 
"yarn.resourcemanager.work-preserving-recovery.enabled" is not needed any more.
Sounds good. Thanks [~jianhe] for explanation. We can mark unnecessary 
configuration as deprecated later. [~aw], if you don't have further comments, I 
will commit this simple patch in soon.

> Enable RM work-preserving restart by default 
> ---------------------------------------------
>                 Key: YARN-3019
>                 URL: https://issues.apache.org/jira/browse/YARN-3019
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-3019.1.patch
> The proposal is to set 
> "yarn.resourcemanager.work-preserving-recovery.enabled" to true by default   
> to flip recovery mode to work-preserving recovery from non-work-preserving 
> recovery. 

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