我试图从eclipse执行一个简单的mapreduce程序

package wordcount;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class WordCount {
    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        conf.set("fs.defaultFS", "hdfs://quickstart.cloudera:8020");
        conf.set("mapreduce.framework.name", "yarn");
        conf.set("yarn.resourcemanager.address", "quickstart.cloudera:8032");
        conf.set("yarn.app.mapreduce.am.staging-dir", "/user");
        Job job = Job.getInstance(conf);
        job.setJarByClass(WordCount.class);
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-mapreduce-client-app-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-yarn-common-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-common-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-yarn-api-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-mapreduce-client-core-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/hadoop-mapreduce-client-common-2.6.0-cdh5.7.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/commons-logging-1.2.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/guava-15.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/commons-collections-3.2.2.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/protobuf-java-2.5.0.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/commons-configuration-1.7.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/commons-lang-2.6.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/log4j-1.2.16.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/slf4j-api-1.7.5.jar"));
        job.addFileToClassPath(new Path("/user/cloudera/prasad/jars/slf4j-log4j12-1.7.5.jar"));
        job.setMapperClass(WordCountMapper.class);
        job.setReducerClass(WordCountReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        FileInputFormat.addInputPath(job, new Path("/user/cloudera/prasad/test.txt"));
        FileOutputFormat.setOutputPath(job, new Path("/user/cloudera/prasad/wordout2"));
        job.waitForCompletion(true);
    }
}

最初我运行上面的程序时，它在容器日志中抛出了一些classnotfoundexceptions，所以我添加了程序中编写的所有相应的jar。现在它在容器日志中没有显示任何错误，但是mapreduce作业失败了。
但是资源管理器显示以下错误

Exception from container-launch with container ID: container_1473338609943_0003_01_000001 and exit code: 1
ExitCodeException exitCode=1: 
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:561)
    at org.apache.hadoop.util.Shell.run(Shell.java:478)
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:738)
    at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:211)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:302)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:82)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

当我单击应用程序日志时，它没有显示任何内容，只是显示以下消息。

Log Type: stderr

Log Upload Time: Thu Sep 08 05:26:35 -0700 2016

Log Length: 243

log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.impl.MetricsSystemImpl).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Log Type: stdout

Log Upload Time: Thu Sep 08 05:26:35 -0700 2016

Log Length: 0

请让我知道我的程序有什么问题。
下面是我正在使用的lib的屏幕