Akira AJISAKA commented on YARN-1177:

Hi [~ywskycn], how is the issue going? I want to take it over.
Automatic failover has been already supported, however, when executing graceful 
failover from command line, UnsupportedOperationException is thrown.
  public InetSocketAddress getZKFCAddress() {
    // TODO (YARN-1177): ZKFC implementation
    throw new UnsupportedOperationException("RMHAServiceTarget doesn't have " +
        "a corresponding ZKFC address");

> Support automatic failover using ZKFC
> -------------------------------------
>                 Key: YARN-1177
>                 URL: https://issues.apache.org/jira/browse/YARN-1177
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Karthik Kambatla
>            Assignee: Wei Yan
>         Attachments: yarn-1177-ancient-version.patch
> Prior to embedding leader election and failover controller in the RM 
> (YARN-1029), it might be a good idea to use ZKFC for a first-cut automatic 
> failover implementation.

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