hadoop-test-1.2.1.jar 的一个问题

问题： 

[root@fsmanager hadoop]# hadoop jar hadoop-test-1.2.1.jar

WARNING: Use "yarn jar" to launch YARN applications.

java.lang.NoSuchMethodException: org.apache.hadoop.ipc.TestIPC.main([Ljava.lang.String;)

        at java.lang.Class.getMethod(Class.java:1665)

        at org.apache.hadoop.util.ProgramDriver$ProgramDescription.<init>(ProgramDriver.java:59)

        at org.apache.hadoop.util.ProgramDriver.addClass(ProgramDriver.java:103)

        at org.apache.hadoop.test.AllTestDriver.main(AllTestDriver.java:63)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

        at java.lang.reflect.Method.invoke(Method.java:606)

        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)

        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

原因及解决办法：