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From "Roman Shaposhnik (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3319) multifilewc from hadoop examples seems to be broken in 0.20.205.0
Date Thu, 24 Nov 2011 01:46:43 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Roman Shaposhnik updated MAPREDUCE-3319:
----------------------------------------

         Priority: Blocker  (was: Major)
    Fix Version/s: 0.20.206.0
                   0.20.205.1

I really think we should fix this before releasing any version that has a potential of becoming
Hadoop 1.0. I'll try to see if I can cook up a patch to fix it. If not -- I'd say it is better
to disable this example, rather than shipping a broken one.

Agreed?
                
> multifilewc from hadoop examples seems to be broken in 0.20.205.0
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-3319
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3319
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: examples
>    Affects Versions: 0.20.205.0
>            Reporter: Roman Shaposhnik
>            Priority: Blocker
>              Labels: bigtop
>             Fix For: 0.20.205.1, 0.20.206.0
>
>
> {noformat}
> /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)
> {noformat}

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