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https://issues.apache.org/jira/browse/MAPREDUCE-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amareshwari Sriramadasu updated MAPREDUCE-1178:
-----------------------------------------------
Status: Open (was: Patch Available)
Cancelling patch, since it introduces a hack in LineRecordReader
> MultipleInputs fails with ClassCastException
> ---------------------------------------------
>
> Key: MAPREDUCE-1178
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1178
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.21.0
> Reporter: Jay Booth
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-1178.patch
>
>
> When running MultipleInputs against the new API, we get failures with this
> ClassCastException:
> java.lang.ClassCastException:
> org.apache.hadoop.mapreduce.lib.input.TaggedInputSplit cannot be cast to
> org.apache.hadoop.mapreduce.lib.input.FileSplit
> at
> org.apache.hadoop.mapreduce.lib.input.LineRecordReader.initialize(LineRecordReader.java:70)
> at
> org.apache.hadoop.mapreduce.lib.input.KeyValueLineRecordReader.initialize(KeyValueLineRecordReader.java:59)
> at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:439)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:599)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:257)
> The unit test for MultipleInputs doesn't actually run a job so this snuck
> through while still passing the unit test. Attached patch fixes the unit
> test to expose the failure and does a little casting kung-fu in
> LineRecordReader to avoid the error.
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