[jira] [Comment Edited] (HBASE-20976) SCP can be scheduled multiple times for the same RS

["Allan Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-20976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561837#comment-16561837 ] 

Allan Yang edited comment on HBASE-20976 at 7/30/18 12:09 PM:
--------------------------------------------------------------

Confirmed that this issue only exists in branch-2.0, Other 2.x branch is fixed by HBASE-20708.


was (Author: allan163):
confirmed that this issue only exists in branch-2.0, Other 2.x branch is fixed by HBASE-20708.

> SCP can be scheduled multiple times for the same RS
> ---------------------------------------------------
>
>                 Key: HBASE-20976
>                 URL: https://issues.apache.org/jira/browse/HBASE-20976
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.1
>            Reporter: Allan Yang
>            Assignee: Allan Yang
>            Priority: Major
>         Attachments: HBASE-20976.branch-2.0.001.patch
>
>
> SCP can be scheduled multiple times for the same RS:
> 1. a RS crashed, a SCP was submitted for it
> 2. before this SCP finish, the Master crashed
> 3. The new master will scan the meta table and find some region is still open on a dead server
> 4. The new master submit a SCP for the dead server again
> The two SCP for the same RS can even execute concurrently if without HBASE-20846…
> Provided a test case to reproduce this issue and a fix solution in the patch.



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