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Posted to issues@hbase.apache.org by "Jonathan Hsieh (Commented) (JIRA)" <ji...@apache.org> on 2012/03/20 03:53:37 UTC
[jira] [Commented] (HBASE-5583) Master restart on create table with
splitkeys does not recreate table with all the splitkey regions
[ https://issues.apache.org/jira/browse/HBASE-5583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13233150#comment-13233150 ]
Jonathan Hsieh commented on HBASE-5583:
---------------------------------------
Maybe we should put plans for master actions into ZK, and then remove each step as they are completed. This would allow a backup master or the restarted master to pick up and continue where the previous master had died.
So this we may have a zk structure act like a queue with region infos and then let the masters drain from there to create .META. rows.
I was thinking about adding a flag to info:regioninfo or extra column ("info:unfinshedPresplitCreate") but this would seem to suffer from a similar problem if the master failed as these were being removed after all regions created.
> Master restart on create table with splitkeys does not recreate table with all the splitkey regions
> ---------------------------------------------------------------------------------------------------
>
> Key: HBASE-5583
> URL: https://issues.apache.org/jira/browse/HBASE-5583
> Project: HBase
> Issue Type: Bug
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 0.96.0
>
>
> -> Create table using splitkeys
> -> MAster goes down before all regions are added to meta
> -> On master restart the table is again enabled but with less number of regions than specified in splitkeys
> Anyway client will get an exception if i had called sync create table. But table exists or not check will say table exists.
> Is this scenario to be handled by client only or can we have some mechanism on the master side for this? Pls suggest.
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