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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-2240) Balancer should not reassign (because of overloading) a region that was just opened
Date Fri, 06 May 2011 17:24:03 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack resolved HBASE-2240.
--------------------------

    Resolution: Invalid

Resolving as invalid (Jon argues this in body of this issue and stuff suggested in the issue
-- upping balancer period -- has been implemented)

> Balancer should not reassign (because of overloading) a region that was just opened
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-2240
>                 URL: https://issues.apache.org/jira/browse/HBASE-2240
>             Project: HBase
>          Issue Type: Bug
>          Components: documentation
>            Reporter: stack
>            Priority: Minor
>
> I'm running a mapreduce job.  I see a region split and its daughters come on line and
then 8 seconds later, master judges the regionserver overloaded and so closes the just-opened
region.  This messes up clients.   They may have just picked up the new location for their
row query and now its moved again and client has to go hunting anew. 
> We need to assign the vintage regions first.
> I'm going to change balancer slop.  Its not sloppy enough and balancing cuts in too early.

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