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From "Umesh Agashe (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HBASE-18575) [AMv2] Enable and fix TestRestartCluster#testRetainAssignmentOnRestart on master
Date Tue, 22 Aug 2017 23:39:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-18575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HBASE-18575 started by Umesh Agashe.
--------------------------------------------
> [AMv2] Enable and fix TestRestartCluster#testRetainAssignmentOnRestart on master
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-18575
>                 URL: https://issues.apache.org/jira/browse/HBASE-18575
>             Project: HBase
>          Issue Type: Bug
>          Components: amv2
>    Affects Versions: 2.0.0
>            Reporter: Umesh Agashe
>            Assignee: Umesh Agashe
>            Priority: Critical
>             Fix For: 2.0.0
>
>
> * Test creates 3 node cluster (master + 2 RS) and creates 3 tables with 1 region each.
> * It then takes a snapshot of region assignments
> * Shuts down the cluster and restarts with 4 nodes (2 RS on same ports, 1 RS on port
where master was running previously and master on new port)
> * Takes snapshot of region assignments
> * Expected behavior is regions will be retained on RS with appropriate ports
> Debugging done so far shows that, when cluster is restarted meta is loaded but meta has
old entries (though the ports are same for RSs, start timestamps are different). AssignmentManager#processofflineServersWithOnlineRegions()
finds that old RS with different timestamps are not online even though regions assigned to
them are online; triggering submitting SCP for each those RSs. Subprocedure AssignProcedure
of SCP has forceNewPlan set to true. Which triggers re-assignment of regions.



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