[jira] [Commented] (HBASE-20708) Remove the usage of RecoverMetaProcedure in master startup

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

    [ https://issues.apache.org/jira/browse/HBASE-20708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16507893#comment-16507893 ] 

Duo Zhang commented on HBASE-20708:
-----------------------------------

So when startup, we will first go to zookeeper to ask for the location of the meta region, and then check whether the region server is still online, if not, will try to schedule a SCP for it, of course we need to check whether there is already a SCP for it. And then we start everything else. And for SCP it will not schedule an RMP for recover meta, just include the logic in RMP to its own code.


> Remove the usage of RecoverMetaProcedure in master startup
> ----------------------------------------------------------
>
>                 Key: HBASE-20708
>                 URL: https://issues.apache.org/jira/browse/HBASE-20708
>             Project: HBase
>          Issue Type: Bug
>          Components: proc-v2, Region Assignment
>            Reporter: Duo Zhang
>            Priority: Blocker
>             Fix For: 3.0.0, 2.1.0
>
>
> In HBASE-20700, we make RecoverMetaProcedure use a special lock which is only used by RMP to avoid dead lock with MoveRegionProcedure. But we will always schedule a RMP when master starting up, so we still need to make sure that there is no race between this RMP and other RMPs and SCPs scheduled before the master restarts.



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