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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12904) Threading issues in region_mover.rb
Date Thu, 22 Jan 2015 19:06:37 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14288005#comment-14288005
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Andrew Purtell commented on HBASE-12904:
----------------------------------------

I'm going to interpret it as such :-) and commit shortly to 0.98+ unless objection.

> 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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