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https://issues.apache.org/jira/browse/MAPREDUCE-1784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932125#action_12932125
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Hudson commented on MAPREDUCE-1784:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #541 (See
[https://hudson.apache.org/hudson/job/Hadoop-Mapreduce-trunk-Commit/541/])
MAPREDUCE-1784. IFile should check for null compressor. Contributed by Eli
Collins.
> IFile should check for null compressor
> --------------------------------------
>
> Key: MAPREDUCE-1784
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1784
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.20.3, 0.21.1, 0.22.0
> Reporter: Eli Collins
> Assignee: Eli Collins
> Priority: Minor
> Fix For: 0.22.0
>
> Attachments: mapred-1784-1.patch, mapred-1784-2.patch
>
>
> IFile assumes that when it has a codec it can always get a compressor. This
> fails when mapred.compress.map.output is true but the native libraries are
> not installed, resulting in an NPE:
> {code}
> java.lang.NullPointerException
> at org.apache.hadoop.mapred.IFile$Writer.<init>(IFile.java:102)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1198)
> at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1091)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:359)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
> at org.apache.hadoop.mapred.Child.main(Child.java:170)
> {code}
> Let's make IFile handle this case by logging and using non-compressed
> streams.l
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