nemon lou created YARN-1033:
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Summary: Expose RM active/standby state to web UI and metrics
Key: YARN-1033
URL: https://issues.apache.org/jira/browse/YARN-1033
Project: Hadoop YARN
Issue Type: Sub-task
Affects Versions: 2.1.0-beta
Reporter: nemon lou
Both active and standby RM shall expose it's web server and show it's current
state (active or standby) on web page.
Cluster metrics also need this state for monitor.
RM web services shall refuse client request unless querying for RM state.
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