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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7521) fix HBASE-6060 (regions stuck in opening state) in 0.94
Date Fri, 15 Mar 2013 02:38:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13603035#comment-13603035
] 

Sergey Shelukhin commented on HBASE-7521:
-----------------------------------------

Hi. Quick check: what (if anything at all) prevents a race condition in this patch as is,
if some server A dies, we start assigning the region from it to other server Band that server
also dies (or, worse yet, it died before and now restarted, and we process the SSH just now).
Wouldn't it cause double assign - first time assign of "resident" region from A, then "incoming"
region of B?
                
> fix HBASE-6060 (regions stuck in opening state) in 0.94
> -------------------------------------------------------
>
>                 Key: HBASE-7521
>                 URL: https://issues.apache.org/jira/browse/HBASE-7521
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>             Fix For: 0.94.6
>
>         Attachments: 7521-original-patch-ported-v4.patch, HBASE-7521-original-patch-ported-v0.patch,
HBASE-7521-original-patch-ported-v1.patch, HBASE-7521-original-patch-ported-v2.patch, HBASE-7521-original-patch-ported-v3.patch,
HBASE-7521-v0.patch, HBASE-7521-v1.patch, HBASE-7521-v5.patch
>
>
> Discussion in HBASE-6060 implies that the fix there does not work on 0.94. Still, we
may want to fix the issue in 0.94 (via some different fix) because the regions stuck in opening
for ridiculous amounts of time is not a good thing to have.

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