[jira] Commented: (HBASE-1419) Assignment and balance need to coordinate; assigner gives out up to 10 regions at a time unbalancing a balanced cluster making for churn, etc.

["Jonathan Gray (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-1419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725866#action_12725866 ] 

Jonathan Gray commented on HBASE-1419:
--------------------------------------

Maybe we can clean this behavior up as part of HBASE-1583

> Assignment and balance need to coordinate; assigner gives out up to 10 regions at a time unbalancing a balanced cluster making for churn, etc.
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1419
>                 URL: https://issues.apache.org/jira/browse/HBASE-1419
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>
> Assigner needs to take into account current region balance.  I'm seeing on recovery from a crash on a big cluster that we'll give near ten regions to first regionserver that reports in.  If that regionserver successfully opens the assigned ten, then that'll put it over the balancer slop differential and it'll then be asked to close its regions by the balancer.  This adds to the regionserver crash churn.  Dumb.

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