在Eclipse里面写了个測试程序：把HDFS中的数据批量导入到HBase中

写好后，在本地測试遇到了例如以下问题：

14/04/21 16:49:53 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

14/04/21 16:49:53 ERROR security.UserGroupInformation: PriviledgedActionException as:admin cause:java.io.IOException: Failed to set permissions of path: \tmp\hadoop-admin\mapred\staging\admin-1518427785\.staging to 0700

Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-admin\mapred\staging\admin-1518427785\.staging to 0700

at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:690)

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:1)

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.plocc.hadoop.hbase.BatchImport.main(BatchImport.java:104)

此时我把程序打包到Linux上执行是okey的，那说明是Windows下文件权限问题，

然后依据at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:690)这个错误信息找到了源代码，

然后一步步调试到Win32FileSystem.class中的

public native boolean setPermission(File f, int access, boolean enable, boolean owneronly);方法，

这个native格式的方法可能在c或者c++里面调用了，没法继续跟踪了，所以我这里的解决方法是把

private static void checkReturnValue(boolean rv, File p, 

                                       FsPermission permission

                                       ) throws IOException {

       

 if (!rv) {

      throw new IOException("Failed to set permissions of path: " + p + 

                            " to " + 

                            String.format("%04o", permission.toShort()));

    }

  }

  

标记经色部分的代码先凝视掉，保证在windows下測试通过。