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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12904) Threading issues in region_mover.rb
Date Thu, 22 Jan 2015 16:58:34 GMT
Lars Hofhansl created HBASE-12904:

             Summary: Threading issues in region_mover.rb
                 Key: HBASE-12904
                 URL: https://issues.apache.org/jira/browse/HBASE-12904
             Project: HBase
          Issue Type: Bug
            Reporter: Lars Hofhansl

We've seen various race conditions when using region_mover with multiple threads.

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

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

Looking at getTable, it's not thread safe. So the multithreaded that was added is incorrect.

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