Execute Commands: [root@hadoop102 mapreduce]# hadoop jar mapreduce2_maven.jar Filter

Error Messages:

Exception in thread "main" java.lang.ClassNotFoundException: Filter
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.hadoop.util.RunJar.run(RunJar.java:311)
at org.apache.hadoop.util.RunJar.main(RunJar.java:232)

Solution: change hadoop jar mapreduce2_maven.jar Filter to hadoop jar mapreduce2_maven.jar exper.
Reason: class path problem

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