Hadoop streaming might succeed even through reducer fails
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Key: MAPREDUCE-4136
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4136
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/streaming
Affects Versions: 0.20.205.0
Reporter: Wouter de Bie
Hadoop streaming can even succeed even though the reducer has failed. This
happens when Hadoop calls {{PipeReducer.close}}, but in the mean time the
reducer has failed and the process has died. When {{clientOut_.flush()}} throws
an {{IOException}} in {{PipeMapRed.mapRedFinish()}} this exception is caught
but only logged. The exit status of the child process is never checked and task
is marked as successful.
We're working on a patch.
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