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https://issues.apache.org/jira/browse/HBASE-12904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell updated HBASE-12904:
-----------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Pushed to 0.98+
> Threading issues in region_mover.rb
> -----------------------------------
>
> Key: HBASE-12904
> URL: https://issues.apache.org/jira/browse/HBASE-12904
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.9
> Reporter: Lars Hofhansl
> Assignee: Andrew Purtell
> Fix For: 1.0.0, 2.0.0, 0.98.10, 1.1.0
>
> Attachments: HBASE-12904-0.98.patch, HBASE-12904.patch
>
>
> We've seen various race conditions when using region_mover with multiple
> threads.
> {code}
> NoMethodError: undefined method `getScanner' for nil:NilClass
> isSuccessfulScan at
> /home/sfdc/current//bigdata-hbase/hbase/hbase/bin/region_mover.rb:138
> unloadRegions at
> /home/sfdc/current//bigdata-hbase/hbase/hbase/bin/region_mover.rb:360
> {code}
> {code}
> NoMethodError: undefined method `[]=' for nil:NilClass
> getTable at
> /home/sfdc/current//bigdata-hbase/hbase/hbase/bin/region_mover.rb:64
> unloadRegions at
> /home/sfdc/current//bigdata-hbase/hbase/hbase/bin/region_mover.rb:359
> {code}
> Looking at getTable, it's not thread safe. So the multithreaded that was
> added is incorrect.
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