这是我第一次使用hadoop并尝试用它运行gridmix2。我已经安装了hadoop 2.2.0，但是当我尝试使用gridmix生成数据时，出现了以下错误：

**

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.mapred.JobClient.init(JobClient.java:470)
    at org.apache.hadoop.mapred.JobClient.<init>(JobClient.java:460)
    at org.apache.hadoop.examples.RandomTextWriter.run(RandomTextWriter.java:180)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.examples.RandomTextWriter.main(RandomTextWriter.java:248)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
    at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
    at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

但是在我的hadoop-env.sh文件中我发现：

**

# Extra Java CLASSPATH elements.  Automatically insert capacity-scheduler.

for f in $HADOOP_HOME/contrib/capacity-scheduler/*.jar; do
    if [ "$HADOOP_CLASSPATH" ]; then
        export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f
    else
        export HADOOP_CLASSPATH=$f
    fi
done

**

问题是我的系统中不存在contrib/capacity调度器。
谢谢你的帮助！