hadoop中的问题总结

在做hadoop例子中，Win7远程连接linux服务器上的hadoop 出现一下问题：

 

12/04/24 15:32:44 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
12/04/24 15:32:44 ERROR security.UserGroupInformation: PriviledgedActionException as:Administrator cause:java.io.IOException: Failed to set permissions of path: 
xxxxxxxx
Exception in thread "main" java.io.IOException: Failed to set permissions of path: xxxxxx
    at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:682)
    at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:655)
    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:856)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:850)
    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:1093)
    at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:850)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:500)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:530)
    at 

 

 经过分析之后，需要修改hadoop的源码，我使用的是hadoop-1.0.4，修改hadoop-core-1.0.4.jar 中对应的org.apache.hadoop.fs.FileUtil 的代码为，如下：

 

 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()));
    }
	**/
  }

打包之后，重新编译，放到项目中，就可以正常运行了，附件是修改之后，重新编译的hadoop-core-1.0.4.jar