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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5685) Non-embedded HA failover is broken
Date Wed, 28 Sep 2016 21:40:20 GMT

     [ https://issues.apache.org/jira/browse/YARN-5685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

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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