Wordcount示例错误

Question

有人知道如何解决这个错误吗？我读到过可以用checkReturnValue在fileutils.setPermission中编辑和删除行，但我不知道怎么做。

13/03/10 13:04:14 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
13/03/10 13:04:14 ERROR security.UserGroupInformation: PriviledgedActionException as:Nesreen.Mamdouh cause:java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Nesreen.Mamdouh\mapred\staging\Nesreen.Mamdouh64097525\.staging to 0700
Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Nesreen.Mamdouh\mapred\staging\Nesreen.Mamdouh64097525\.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: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(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:850)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:824)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1261)
at BigDataPackage.WordCount.main(WordCount.java:55)

Answer 1

我相信你是在Windows上运行这个程序。我相信here也解决了类似的问题

查看有关Windows-hadoop installation here的一些信息

Answer 2

您可以使用以下解决方法来抑制此错误：

在hadoop目录下，转到685行的src->core->org->apache->hadoop->fs

• Open FileUtil.Java

• Comment out

1. 中的checkReturnValue函数。
2. 重新创建hadoop-
3. -1.0.4.jar，并将其包含在eclipse项目的构建路径中。

这应该可以解决问题。