[ https://issues.apache.org/jira/browse/YARN-5685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Templeton updated YARN-5685:
-----------------------------------
Description: If HA is enabled with automatic failover enabled and embedded failover disabled,
all RMs all come up in standby state. To make one of them active, the {{--forcemanual}} flag
must be used when manually triggering the state change. Should the active go down, the standby
will not become active and must be manually transitioned with the {{--forcemanual}} flag.
(was: YARN-4559 broke RM HA when embedded automatic failover is disabled. The {{ZKRMStateStore}}
will now only start its monitoring thread when automatic failover not enabled (which is patently
useless). I presume the intended change was to have the monitoring thread started when automatic
failover is not *embedded*.
If HA is enabled with automatic failover enabled and embedded failover disabled, all RMs all
come up in standby state. To make one of them active, the {{--forcemanual}} flag must be
used when manually triggering the state change. Should the active go down, the standby will
not become active and must be manually transitioned with the {{--forcemanual}} flag.)
> Non-embedded HA failover is broken
> ----------------------------------
>
> Key: YARN-5685
> URL: https://issues.apache.org/jira/browse/YARN-5685
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.9.0, 3.0.0-alpha1
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
> Priority: Critical
>
> If HA is enabled with automatic failover enabled and embedded failover disabled, all
RMs all come up in standby state. To make one of them active, the {{--forcemanual}} flag
must be used when manually triggering the state change. Should the active go down, the standby
will not become active and must be manually transitioned with the {{--forcemanual}} flag.
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