org.apache.hadoop.mapred.jobcontrol.getAssignedJobID throw class cast exception
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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
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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