Not sure which specific tests you are talking about. There are two types of them: - Real unit tests which unit test code, shouldn't run any MR jobs - The remaining 'unit' tests are really integration tests. They start MiniMRCluster and MiniDFSCluster (which are basically in-JVM MR and DFS) and submit jobs to them.
HTH +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/ On Feb 21, 2013, at 12:11 PM, Pedro Sá da Costa wrote: > 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? > > > -- > Best regards, > P
