本文详细解析了在Hadoop环境中遇到的MultipleOutput使用过程中遇到的错误，包括无法加载本地库的问题以及文件权限设置失败导致的IOException，并提供了有效的解决方案。
今天没事干，看了以下Hadoop中的MultipleOutput使用，出现错误.
错误信息：
14/08/12 12:44:02 WARN util.NativeCodeLoader: Unable to load native-ha：oop library for your platform... using builtin-java classes where applicable
14/08/12 12:44:02 ERROR security.UserGroupInformation: PriviledgedActionException as:Xr cause:java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Xr\mapred\staging\Xr-1514460710\.staging to 0700
Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Xr\mapred\staging\Xr-1514460710\.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:1149)
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 com.xr.text.JobTest.main(JobTest.java:37)
解决方案：
Date：2014.08.12 15:09
Name：Xr
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