[jira] [Created] (YARN-6609) AdminService should use RMFatalEvent instead of calling transitionToStandby() directly

["Daniel Templeton (JIRA)" <ji...@apache.org>]

Daniel Templeton created YARN-6609:
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             Summary: AdminService should use RMFatalEvent instead of calling transitionToStandby() directly
                 Key: YARN-6609
                 URL: https://issues.apache.org/jira/browse/YARN-6609
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
    Affects Versions: 2.9.0
            Reporter: Daniel Templeton
            Assignee: Daniel Templeton
            Priority: Minor


In YARN-3742, we put the RM in charge of transitioning itself to standby.  Instead of having lots of different components driving the transition from lots of different places, they now throw an {{RMFatalEvent}} at the RM, and the RM decides what the right thing to do is.

{{AdminService}} still calls {{transitionToStandby()}} directly, without first checking whether HA is enabled.  To be consistent and safer, {{AdminService}} should probably also use an {{RMFatalEvent}} to initiate the transition.

This change might have some cascading API impact, making some methods no longer useful.



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