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https://issues.apache.org/jira/browse/HADOOP-4620?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devaraj Das updated HADOOP-4620:
--------------------------------
Description:
A mapper of a streaming job has empty input data and thus it produces no output.
The task never completes.
The following are the last two lines from the task log:
2008-11-07 21:59:48,254 INFO org.apache.hadoop.streaming.PipeMapRed: PipeMapRed
exec [/usr/bin/perl, xxx]
2008-11-07 21:59:48,330 INFO org.apache.hadoop.streaming.PipeMapRed:
mapRedFinished
was:
A mapper of a streaming job has empty input data and thus it produces no output.
The task never completes.
The following are the last two lines from the task log:
2008-11-07 21:59:48,254 INFO org.apache.hadoop.streaming.PipeMapRed: PipeMapRed
exec [/usr/bin/perl, xxx]
2008-11-07 21:59:48,330 INFO org.apache.hadoop.streaming.PipeMapRed:
mapRedFinished
Fix Version/s: 0.18.3
> Streaming mapper never completes if the mapper does not write to stdout
> -----------------------------------------------------------------------
>
> Key: HADOOP-4620
> URL: https://issues.apache.org/jira/browse/HADOOP-4620
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.17.2
> Reporter: Runping Qi
> Assignee: Ravi Gummadi
> Fix For: 0.18.3
>
> Attachments: HADOOP-4620.patch, HADOOP17-4620.patch,
> solves_mapper_4620.patch
>
>
> A mapper of a streaming job has empty input data and thus it produces no
> output.
> The task never completes.
> The following are the last two lines from the task log:
> 2008-11-07 21:59:48,254 INFO org.apache.hadoop.streaming.PipeMapRed:
> PipeMapRed exec [/usr/bin/perl, xxx]
> 2008-11-07 21:59:48,330 INFO org.apache.hadoop.streaming.PipeMapRed:
> mapRedFinished
>
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