解决Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses

报错

Exception in thread "main" 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:422)
    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 com.admin.hadoop.mapreduce.avgstudent.AvgScore.run(AvgScore.java:86)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.admin.hadoop.mapreduce.avgstudent.AvgScore.main(AvgScore.java:91)

解决办法：

缺少Jar包：Hadoop-mapreduce-client-common-2.2.0.jar

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