ERROR security.UserGroupInformation: PriviledgedActionException 解决方法

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eclipse 下验证mapreduce时，报一下错误：

13/11/03 18:28:25 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
13/11/03 18:28:25 ERROR security.UserGroupInformation: PriviledgedActionException as:zhangxinfa cause:java.io.IOException: Failed to set permissions of path: \tmp\hadoop-zhangxinfa\mapred\staging\zhangxinfa113628799\.staging to 0700
java.io.IOException: Failed to set permissions of path: \tmp\hadoop-zhangxinfa\mapred\staging\zhangxinfa113628799\.staging to 0700
at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:689)
at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:662)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:509)
at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:344)
at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:189)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:116)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:918)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:912)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:912)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:500)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:530)
at Test.run(Test.java:92)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at Test.main(Test.java:60)

解决办法：

Configuration conf = new Configuration();

conf.set("mapred.job.tracker", "[server]:9001");

　　 "[server]:9001"中的"[server]"为Hadoop集群Master的IP地址。