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MapReduce >> mail # user >> who runs the map and reduce tasks in the unit tests


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who runs the map and reduce tasks in the unit tests
Hi,

In Hadoop MR unit tests, the classes uses the
./core/org/apache/hadoop/util/Tool.java, and
./core/org/apache/hadoop/util/ToolRunner.java tosubmit the job. But to
run the unit tests it seems that it's not needed the MR be running. If
so, who runs the map and reduce tasks?
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Best regards,
P