[jira] [Updated] (HBASE-21508) Ignore the reportRegionStateTransition call from a dead server

["Duo Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-21508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Duo Zhang updated HBASE-21508:
------------------------------
    Assignee: Duo Zhang
      Status: Patch Available  (was: Open)

> Ignore the reportRegionStateTransition call from a dead server
> --------------------------------------------------------------
>
>                 Key: HBASE-21508
>                 URL: https://issues.apache.org/jira/browse/HBASE-21508
>             Project: HBase
>          Issue Type: Sub-task
>          Components: amv2
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0, 2.2.0
>
>         Attachments: HBASE-21508.patch
>
>
> In our ITBLL test we observer a race between the SCP and TRSP which causes a region being assigned to two region servers.
> Not fully understand the scenario, but anyway, the we do not consider the situation in the old code, that after SCP gets the region list of a dead server, there could still be a reportRegionStateTransition call from dead server and mess up things.
> In general, I think we should have a fence in the AssignmentManager to prevent the reportRegionStateTransition from the dead servers to mess up the states.



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