在 cygwin 中运行简单的 map-reduce hadoop 示例时出现问题

我只是想在独立模式下运行 64 位 Windows 7 的笔记本电脑上运行 Hadoop。我已将 Cygwin 1.7 安装在默认文件夹 (c:\cygwin) 中。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)

我尝试过 Hadoop 1.0.1 和 hadoop-0.20.205.0 并遇到同样的问题。我已经更新了我的 .bashrc

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

我还将 cygwin bin 文件夹添加到路径中：

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

我还发现很奇怪，它将路径显示为 \tmp... 而不是 /tmp/...

缺少重新编译或运行 Linux VM，有什么想法吗？

这是一个简单易用的解决方法，不需要任何牦牛剃毛：

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