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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Closed: (HADOOP-219) SequenceFile#handleChecksumException NPE
Date Mon, 05 Jun 2006 23:08:55 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-219?page=all ]
     
Doug Cutting closed HADOOP-219:
-------------------------------


> SequenceFile#handleChecksumException NPE
> ----------------------------------------
>
>          Key: HADOOP-219
>          URL: http://issues.apache.org/jira/browse/HADOOP-219
>      Project: Hadoop
>         Type: Bug

>   Components: io
>     Reporter: stack@archive.org
>     Assignee: Doug Cutting
>     Priority: Trivial
>      Fix For: 0.3.0
>  Attachments: hadoop-219.patch
>
> The SequenceFile#handleChecksumException assumes the conf data member has been set. 
It will not be set if we use the 'Reader(FileSystem fs, Path file, int bufferSize, long start,
long length)' constructor.  The latter is used by ReduceTask Sorter:
> java.lang.NullPointerException
> 	at org.apache.hadoop.io.SequenceFile$Reader.handleChecksumException(SequenceFile.java:407)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:400)
> 	at org.apache.hadoop.io.SequenceFile$Sorter$MergeStream.next(SequenceFile.java:837)
> 	at org.apache.hadoop.io.SequenceFile$Sorter$MergeQueue.merge(SequenceFile.java:881)
> 	at org.apache.hadoop.io.SequenceFile$Sorter$MergePass.run(SequenceFile.java:766)
> 	at org.apache.hadoop.io.SequenceFile$Sorter.mergePass(SequenceFile.java:702)
> 	at org.apache.hadoop.io.SequenceFile$Sorter.sort(SequenceFile.java:528)
> 	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:253)
> 	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:787)

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