Mailing-List: contact hbase-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hbase-dev@hadoop.apache.org
Message-ID: <2011224933.1243618605569.JavaMail.jira@brutus>
Date: Fri, 29 May 2009 10:36:45 -0700 (PDT)
From: "stack (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1457) Taking down ROOT/META regionserver
 can result in cluster becoming in-operational
In-Reply-To: <693429634.1243576005977.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HBASE-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714525#action_12714525 ] 

stack commented on HBASE-1457:
------------------------------

Patch changes MetaRegion so it takes a HRegionInfo rather than region name and startkey.

It ensures -ROOT- and .META. assignment happens first -- previous -ROOT- didn't get special treatment.  Also, doesn't depend on getting close of catalog region.  Instead, exiting, checks if server was carrying catalog regions and if it was, schedules them for immediate assignment (no log splitting when server exits, as opposes to crashes).

It takes the updating of region historian out of the main code path processing alls-well messages putting it instead on the todo queue to be processed by worker thread IF meta and root are on line.


> Taking down ROOT/META regionserver can result in cluster becoming in-operational
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-1457
>                 URL: https://issues.apache.org/jira/browse/HBASE-1457
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: ryan rawson
>            Assignee: ryan rawson
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1457.patch
>
>
> Take down a regionserver via controlled or uncontrolled shutdown, the master doesn't properly reassign the root/meta regions. 

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.