我这边跑mr程序遇到 这样的问题：

[root@hadoopnamenode bin]# hadoop jar /home/hadoop/soft/hadoop-2.5.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.2.jar wordcount   /usr/data/wc.txt   /out1

java.io.IOException: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses.

at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:120)

at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:82)

at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:75)

at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1255)

at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1251)

at java.security.AccessController.doPrivileged(Native Method)

at javax.security.auth.Subject.doAs(Subject.java:415)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)

at org.apache.hadoop.mapreduce.Job.connect(Job.java:1250)

at org.apache.hadoop.mapreduce.Job.submit(Job.java:1279)

at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)

at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)

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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)

at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)

at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)

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.main(RunJar.java:212)

谁遇到过