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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5746) Errors encountered in MROutputThread after the last map/reduce call can go undetected
Date Mon, 27 Apr 2009 03:40:30 GMT
Errors encountered in MROutputThread after the last map/reduce call can go undetected
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                 Key: HADOOP-5746
                 URL: https://issues.apache.org/jira/browse/HADOOP-5746
             Project: Hadoop Core
          Issue Type: Bug
          Components: contrib/streaming
            Reporter: Devaraj Das
             Fix For: 0.21.0


The framework map/reduce bridge methods make a check at the beginning of the respective methods
whether _MROutputThread_ encountered an exception while writing keys/values that the streaming
process emitted. However, if the exception happens in _MROutputThread_ after the last call
to the map/reduce method, the exception goes undetected. An example of such an exception is
an exception from the _DFSClient_ that fails to write to a file on the HDFS.

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