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https://issues.apache.org/jira/browse/HADOOP-1253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12488389
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Hadoop QA commented on HADOOP-1253:
-----------------------------------

-1, build or testing failed

2 attempts failed to build and test the latest attachment 
http://issues.apache.org/jira/secure/attachment/12355424/hadoop-jobcontrol-v2.patch
 against trunk revision r527711.

Test results:   
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/39/testReport/
Console output: 
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/39/console

Please note that this message is automatically generated and may represent a 
problem with the automation system and not the patch.

> ConcurrentModificationException and NPE in JobControl
> -----------------------------------------------------
>
>                 Key: HADOOP-1253
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1253
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.12.3
>            Reporter: Johan Oskarson
>            Priority: Minor
>         Attachments: hadoop-jobcontrol-v2.patch
>
>
> toArrayList(Hashtable jobs) in JobControl.java isn't synchronized and it 
> resulted in a ConcurrentModificationException.
> checkRunningState in Job.java can throw a NullPointerException if running = 
> jc.getJob(this.mapredJobID) fails, leaving running null.

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