Win7 eclipse Hadoop Failed to set permissions of path
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hadoop1.0.2在windows远程调试linux的程序时,报错:
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: \tmp\hadoop-Administrator\mapred\staging\Administrator-519341271\.staging to 0700
Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-Administrator\mapred\staging\Administrator-519341271\.staging to 0700
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 com.hadoop.learn.test.WordCountTest.main(WordCountTest.java:85)
这个是Windows下文件权限问题,在Linux下可以正常运行,不存在这样的问题。
解决方法是,修改/hadoop-1.0.2/src/core/org/apache/hadoop/fs/FileUtil.java里面的checkReturnValue,注释掉即可(有些粗暴,在Window下,可以不用检查)...... 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()));}**/ }......
重新编译打包hadoop-core-1.0.2.jar,替换掉hadoop-1.0.2根目录下的hadoop-core-1.0.2.jar即可。
这里提供一份修改版的hadoop-core-1.0.2-modified.jar文件,替换原hadoop-core-1.0.2.jar即可。
替换之后,刷新项目,设置好正确的jar包依赖,现在再运行WordCountTest,即可。
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