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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-532) Writable underrun in sort example
Date Thu, 14 Sep 2006 19:08:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-532?page=comments#action_12434776 ] 
            
Bryan Pendleton commented on HADOOP-532:
----------------------------------------

I had trouble reading old compressed SequenceFiles using the new block-compressing code, with
similar kinds of problems. I haven't been able to characterize why, yet, so I don't have anything
useful to add to this bug except "I've seen this general sort of thing, too!". In my case,
it's with a class that's similar to BytesWritable.

> Writable underrun in sort example
> ---------------------------------
>
>                 Key: HADOOP-532
>                 URL: http://issues.apache.org/jira/browse/HADOOP-532
>             Project: Hadoop
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.6.1
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>             Fix For: 0.6.2
>
>
> When running the sort benchmark, I get consistent failures of this sort:
> java.lang.RuntimeException: java.io.IOException: org.apache.hadoop.io.BytesWritable@43d748ad
read 2048 bytes, should read 2052 at org.apache.hadoop.mapred.ReduceTask$ValuesIterator.next(ReduceTask.java:150)
at org.apache.hadoop.mapred.lib.IdentityReducer.reduce(IdentityReducer.java:39) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:271)
at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1066) Caused by: java.io.IOException:
org.apache.hadoop.io.BytesWritable@43d748ad read 2048 bytes, should read 2052 at org.apache.hadoop.io.SequenceFile$Reader.getCurrentValue(SequenceFile.java:1163)
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1239) at org.apache.hadoop.mapred.ReduceTask$ValuesIterator.getNext(ReduceTask.java:181)
at org.apache.hadoop.mapred.ReduceTask$ValuesIterator.next(ReduceTask.java:147) ... 3 more

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