[jira] [Created] (HBASE-12989) region_mover.rb unloadRegions method uses ArrayList concurrently resulting in errors

[Abhishek Singh Chouhan (JIRA)]

Abhishek Singh Chouhan created HBASE-12989:
----------------------------------------------

             Summary: region_mover.rb unloadRegions method uses ArrayList 
concurrently resulting in errors
                 Key: HBASE-12989
                 URL: https://issues.apache.org/jira/browse/HBASE-12989
             Project: HBase
          Issue Type: Bug
          Components: scripts
    Affects Versions: 0.98.10
            Reporter: Abhishek Singh Chouhan
            Assignee: Abhishek Singh Chouhan
            Priority: Minor
             Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.11


While working on HBASE-12822 ran into 
15/02/04 13:16:44 [main] INFO  reflect.GeneratedMethodAccessor35(?): Pool 
completed
NoMethodError: undefined method `toByteArray' for nil:NilClass
        __for__ at region_mover.rb:270
           each at 
file:/home/sfdc/installed/bigdata-hbase__hbase.6_prod__9707645_Linux.x86_64.prod.runtime.bigdata-hbase_bigdata-hbase/hbase/hbase/lib/jruby-complete-1.6.8.jar!/builtin/java/java.util.rb:7
      writeFile at region_mover.rb:269
  unloadRegions at region_mover.rb:347
         (root) at region_mover.rb:501

This is because 
movedRegions = java.util.ArrayList.new()
is being used concurrently in unloadRegions.



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