[MAPREDUCE-2531] org.apache.hadoop.mapred.jobcontrol.getAssignedJobID throw class cast exception

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: client
• Hadoop Flags: Reviewed
• Assignee: Robert Joseph Evans
• Reporter: Robert Joseph Evans
• Created: 24/May/11 16:07
• Updated: 15/Nov/11 00:49
• Resolved: 05/Oct/11 07:42

Description

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