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Hudson commented on MAPREDUCE-2531: ----------------------------------- Integrated in Hadoop-Mapreduce-22-branch #80 (See [https://builds.apache.org/job/Hadoop-Mapreduce-22-branch/80/]) MAPREDUCE-2531. Fixed jobcontrol to downgrade JobID. Contributed by Robert Evans. shv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1179063 Files : * /hadoop/common/branches/branch-0.22/mapreduce/CHANGES.txt * /hadoop/common/branches/branch-0.22/mapreduce/src/java/org/apache/hadoop/mapred/jobcontrol/Job.java * /hadoop/common/branches/branch-0.22/mapreduce/src/test/mapred/org/apache/hadoop/mapred/jobcontrol/TestJobControl.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 > Priority: Blocker > Fix For: 0.22.0, 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 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira