Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the co

log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
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:1238)
    at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1234)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Unknown Source)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
    at org.apache.hadoop.mapreduce.Job.connect(Job.java:1233)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1262)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1286)
    at com.gome.accesslog.statistic.WordCountExample.main(WordCountExample.java:72)

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

<!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-mapreduce-client-common -->
	<dependency>
	    <groupId>org.apache.hadoop</groupId>
	    <artifactId>hadoop-mapreduce-client-common</artifactId>
	    <version>2.6.4</version>
	</dependency>