hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9480) Regions are unexpectedly made offline in certain failure conditions
Date Wed, 11 Sep 2013 02:43:55 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13763887#comment-13763887

Jimmy Xiang commented on HBASE-9480:

Let me think about to make the region server throw a region already in transition exception
in this case, which is not accurate to throw a not serve region exception.  If a region is
indeed not served in a region server, I think we should delete the znode.
> Regions are unexpectedly made offline in certain failure conditions
> -------------------------------------------------------------------
>                 Key: HBASE-9480
>                 URL: https://issues.apache.org/jira/browse/HBASE-9480
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Priority: Critical
>             Fix For: 0.96.0
>         Attachments: 9480-1.txt
> Came across this issue (HBASE-9338 test):
> 1. Client issues a request to move a region from ServerA to ServerB
> 2. ServerA is compacting that region and doesn't close region immediately. In fact, it
takes a while to complete the request.
> 3. The master in the meantime, sends another close request.
> 4. ServerA sends it a NotServingRegionException
> 5. Master handles the exception, deletes the znode, and invokes regionOffline for the
said region.
> 6. ServerA fails to operate on ZK in the CloseRegionHandler since the node is deleted.
> The region is permanently offline.
> There are potentially other situations where when a RegionServer is offline and the client
asks for a region move off from that server, the master makes the region offline.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

View raw message