Xuan Gong commented on YARN-4107:

bq. Is it caused by network split brain ?

We did it on purpose. Using the iptable to block the all the zk connections 
with the old active RM.

> Both RM becomes Active if all zookeepers can not connect to active RM
> ---------------------------------------------------------------------
>                 Key: YARN-4107
>                 URL: https://issues.apache.org/jira/browse/YARN-4107
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>         Attachments: YARN-4107.1.patch
> Steps to reproduce:
> 1) Run small randomwriter applications in background
> 2) rm1 is active and rm2 is standby 
> 3) Disconnect all Zks and Active RM
> 4) Check status of both RMs. Both of them are in active state

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