在cygwin中运行简单map-reduce hadoop示例的问题

Question

我只是想在我的笔记本电脑上以独立模式运行64位Windows 7时运行Hadoop.我已经在默认文件夹(c:\ cygwin)中安装了Cygwin 1.7.我在文件夹c:\ jdk1.7.0_03中有最新的JDK,并设置了JAVA_HOME环境变量.

当我尝试从cygwin提示符运行以下命令时:

$ bin/hadoop jar hadoop-examples-*.jar grep input output 'dfs[a-z.]+'

这是我得到的错误:

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)

我已经尝试了Hadoop 1.0.1和hadoop-0.20.205.0并得到了同样的问题.我用.更新了我的.bashrc

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

我还在路径中添加了cygwin bin文件夹:

export PATH=.:/cygdrive/c/cygwin/bin:$HADOOP_INSTALL/bin

我也觉得很奇怪它将路径显示为\ tmp ...而不是/ tmp/...

没有重新编译或运行Linux VM,任何想法？

Answer 1

这是一个简单易用的解决方法,不需要任何牦牛剃须:

https://github.com/congainc/patch-hadoop_7682-1.0.x-win

Answer 2

固定（主要牦牛剃毛）

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