问题
I want to use testmapredsort for benchmarking sort in Hadoop. I am NOT using TeraSort now.
hadoop-*test*.jar is supposed to contain the testmapredsort class. But I do not see hadoop-*test*.jar in Hadoop2.
hadoop jar hadoop/share/hadoop/common/hadoop-common-2.2.0-tests.jar testmapredsort /data/unsorted-data -sortOutput /data/sorted-data
回答1:
In Hadoop 1, testmapredsort is launched from AllTestDriver.java, which was indeed in e.g. hadoop-test-1.2.1.jar. In Hadoop 2, it's now in MapredTestDriver.java, which can be found inside of hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0-tests.jar
hadoop jar hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.2.0-tests.jar testmapredsort -sortInput /data/unsorted-data -sortOutput /data/sorted-data
来源：https://stackoverflow.com/questions/25317907/where-is-hadoop-test-jar-in-hadoop2