[MAPREDUCE-3319] multifilewc from hadoop examples seems to be broken in 0.20.205.0

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.20.205.0
• Fix Version/s: 1.0.0
• Component/s: examples
• Labels: bigtop
• Target Version/s: 1.0.0
• Assignee: Subroto Sanyal
• Reporter: Roman Shaposhnik
• Created: 31/Oct/11 21:41
• Updated: 28/Dec/11 10:03
• Resolved: 15/Dec/11 09:10

Description

/usr/lib/hadoop/bin/hadoop jar /usr/lib/hadoop/hadoop-examples-0.20.205.0.22.jar multifilewc  examples/text examples-output/multifilewc
11/10/31 16:50:26 INFO mapred.FileInputFormat: Total input paths to process : 2
11/10/31 16:50:26 INFO mapred.JobClient: Running job: job_201110311350_0220
11/10/31 16:50:27 INFO mapred.JobClient:  map 0% reduce 0%
11/10/31 16:50:42 INFO mapred.JobClient: Task Id : attempt_201110311350_0220_m_000000_0, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.io.IntWritable cannot be cast to org.apache.hadoop.io.LongWritable
	at org.apache.hadoop.mapred.lib.LongSumReducer.reduce(LongSumReducer.java:44)
	at org.apache.hadoop.mapred.Task$OldCombinerRunner.combine(Task.java:1431)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1436)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1298)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:437)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
	at org.apache.hadoop.mapred.Child.main(Child.java:249)