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https://issues.apache.org/jira/browse/MAPREDUCE-2531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043314#comment-13043314
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Hudson commented on MAPREDUCE-2531:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #711 (See
[https://builds.apache.org/hudson/job/Hadoop-Mapreduce-trunk-Commit/711/])
MAPREDUCE-2531. Fixed jobcontrol to downgrade JobID. Contributed by Robert
Evans.
acmurthy :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1130992
Files :
* /hadoop/mapreduce/trunk/CHANGES.txt
*
/hadoop/mapreduce/trunk/src/test/mapred/org/apache/hadoop/mapred/jobcontrol/TestJobControl.java
* /hadoop/mapreduce/trunk/src/java/org/apache/hadoop/mapred/jobcontrol/Job.java
> org.apache.hadoop.mapred.jobcontrol.getAssignedJobID throw class cast
> exception
> --------------------------------------------------------------------------------
>
> Key: MAPREDUCE-2531
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2531
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client
> Affects Versions: 0.22.0
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Fix For: 0.23.0
>
> Attachments: MR-2531-V1-trunk.patch, MR-2531-yarn-v1.patch
>
>
> When using a combination of the mapred and mapreduce APIs (PIG) it is
> possible to have the following exception
> Caused by: java.lang.ClassCastException: org.apache.hadoop.mapreduce.JobID
> cannot be cast to
> org.apache.hadoop.mapred.JobID
> at
> org.apache.hadoop.mapred.jobcontrol.Job.getAssignedJobID(Job.java:71)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:239)
> at org.apache.pig.PigServer.launchPlan(PigServer.java:1325)
> ... 29 more
> This is because the JobID is just downcast. It should be calling
> JobID.downgrade
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