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Posted to common-dev@hadoop.apache.org by "Sameer Paranjpye (JIRA)" <ji...@apache.org> on 2006/09/28 22:22:59 UTC

[jira] Updated: (HADOOP-552) getMapOutput doesn't reliably detect errors and throw to the caller

     [ http://issues.apache.org/jira/browse/HADOOP-552?page=all ]

Sameer Paranjpye updated HADOOP-552:
------------------------------------

    Component/s: mapred

> getMapOutput doesn't reliably detect errors and throw to the caller
> -------------------------------------------------------------------
>
>                 Key: HADOOP-552
>                 URL: http://issues.apache.org/jira/browse/HADOOP-552
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.6.2
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>             Fix For: 0.7.0
>
>
> getMapOutput does not reliabily detect errors in transmission, which usually ends up with an EOFException in the reduce's sort:
> java.io.EOFException
> 	at java.io.DataInputStream.readFully(DataInputStream.java:178)
> 	at java.io.DataInputStream.readFully(DataInputStream.java:152)
> 	at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:952)
> 	at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:937)
> 	at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:928)
> 	at org.apache.hadoop.io.SequenceFile$Sorter$SortPass.run(SequenceFile.java:1594)
> 	at org.apache.hadoop.io.SequenceFile$Sorter.sortPass(SequenceFile.java:1523)
> 	at org.apache.hadoop.io.SequenceFile$Sorter.sort(SequenceFile.java:1496)
> 	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:240)
> 	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1173)

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