mapreduce issue in eclipse

eclipseでWordCountを実行すると、この問題が発生します。mapreduce issue in eclipse

log4j:WARN No appenders could be found for logger (org.apache.hadoop.util.Shell). 
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.lang.NullPointerException 
    at java.lang.ProcessBuilder.start(Unknown Source) 
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:482) 
    at org.apache.hadoop.util.Shell.run(Shell.java:455) 
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:715) 
    at org.apache.hadoop.util.Shell.execCommand(Shell.java:808) 
    at org.apache.hadoop.util.Shell.execCommand(Shell.java:791) 
    at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:656) 
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:444) 
    at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:293) 
    at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:133) 
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:145) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1297) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1294) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at javax.security.auth.Subject.doAs(Unknown Source) 
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1656) 
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1294) 
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1315) 
    at WordCount.main(WordCount.java:81)

問題の可能性のあるアイデアはありますか？

出典

2016-07-12 Brijesh Mishra

あなたは、Eclipse内からクラスタにこのジョブを起動しようとしていますか？ –

いいえ、ちょうど小さなデータセットを使ってeclipseで任意のMRプログラムを実行したい。 –