运行简单映射的问题 - 在cygwin中减少hadoop示例 [英] problems running simple map-reduce hadoop examples in cygwin

问题描述

我只是想让Hadoop运行在我的笔记本电脑上运行64位Windows 7在独立模式。我已经安装Cygwin 1.7在默认文件夹（c：\cygwin）。我有最新的JDK在文件夹c：\jdk1.7.0_03，并设置JAVA_HOME环境变量。

当我尝试从cygwin运行以下命令提示：

  $ bin / hadoop jar hadoop-examples  -  *。jar grep输入输出'dfs [az。] +'
  

这是我得到的错误：

  12/03/17 19:08:43 WARN util.NativeCodeLoader：无法为您的平台加载native-hadoop库...在适用的地方使用builtin-java类
 java.io .IOException：无法将路径的权限设置为：\tmp\hadoop-ehtzrhf\mapred\staging\ehtzrhf837602798\.staging至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： 484）
 at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs（RawLocalFileSystem.java:319）
 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:848）
 at org.apache.hadoop.mapred.JobClient $ 2.run（JobClient.java:842）
在java.security.AccessController.doPrivileged（本地方法）
在javax.security.auth.Subject.doAs Subject.java:415）
 at org.apache.hadoop.security.UserGroupInformation.doAs（UserGroupInformation.java:1059）
 at org.apache.hadoop.mapred.JobClient.submitJobInternal（JobClient.java： 842）
 at org.apache.hadoop.mapred.JobClient.submitJob（JobClient.java:816）
 at org.apache.hadoop.mapred.JobClient.runJob（JobClient.java:1253）
 at org.apache.hadoop.examples.Grep.run（Grep.java:69）
 at org.apache.hadoop.util.ToolRunner.run（ToolRunner.java:65）
 at org .apache.hadoop.examples.Grep.main（Grep.java:93）
 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native方法）
 at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java： 57）
 at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）
 at java.lang.reflect.Method.invoke（Method.java:601）
 at org.apache .hadoop.util.ProgramDriver $ ProgramDescription.invoke（ProgramDriver.java:68）
 at org.apache.hadoop.util.ProgramDriver.driver（ProgramDriver.java:139）
 at org.apache.hadoop .examples.ExampleDriver.main（ExampleDriver.java:64）
 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native方法）
 at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）
 at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）
在java.lang.reflect.Method.invoke（Method.java:601）
 at org.apache.hadoop.util .RunJar.main（RunJar.java:156）
  

我试过使用Hadoop 1.0.1和hadoop-0.20.205.0并得到相同的问题。我已更新我的.bashrc与

  export TMP = / cygdrive / c / temp 
 export TEMP = / cygdrive / c / temp 
  

我还添加了cygwin bin文件夹到路径：

  export PATH =。：/ cygdrive / c / cygwin / bin：$ HADOOP_INSTALL / bin 
  pre> 
 
 
我也觉得很奇怪，它显示的路径为\tmp ...而不是/ tmp /...
 
 
 
没有重新编译或运行Linux VM的任何想法？
解决方案
 / p> 
 
 
  https://issues.apache.org/jira/browse/HADOOP-7682?focusedCommentId=13236645#comment-13236645  
 
I am just trying to get Hadoop running on my laptop running 64-bit Windows 7 in standalone mode.  I've installed Cygwin 1.7 in the default folder (c:\cygwin).  I have the latest JDK in the folder c:\jdk1.7.0_03, and have set JAVA_HOME environment variable.

when I try to run the following command from a cygwin prompt:
$ bin/hadoop jar hadoop-examples-*.jar grep input output 'dfs[a-z.]+'
Here's the error I get:
12/03/17 19:08:43 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
java.io.IOException: Failed to set permissions of path: \tmp\hadoop-ehtzrhf\mapred\staging\ehtzrhf837602798\.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:484)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:319)
        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:848)
        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:842)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:842)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:816)
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1253)
        at org.apache.hadoop.examples.Grep.run(Grep.java:69)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.examples.Grep.main(Grep.java:93)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
        at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
        at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
I've tried with both Hadoop 1.0.1 and also hadoop-0.20.205.0 and get the same issue.  I've updated my .bashrc with
export TMP=/cygdrive/c/temp
export TEMP=/cygdrive/c/temp
I've also added cygwin bin folder to the path:
export PATH=.:/cygdrive/c/cygwin/bin:$HADOOP_INSTALL/bin
I also find it very odd it's showing the path as \tmp... instead of /tmp/...

Short of recompiling or running a Linux VM, any ideas?
解决方案
fixed (major yak shaving)

https://issues.apache.org/jira/browse/HADOOP-7682?focusedCommentId=13236645#comment-13236645

                        
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