环境：Windows7+Cygwin+Hadoop 0.20.203.0
配置：单机模式

运行命令：hadoop jar hadoop-examples-0.20.203.0.jar grep input output 'dfs[a-z.]+'

查看日志，发现是TaskTracker的问题，好像刚开始用bin/start-all.sh后，tasktracker就没有成功启动，说tmp目录权限的问题，如下所示：

2011-06-08 16:32:18,157 ERROR org.apache.hadoop.mapred.TaskTracker: Can not start task tracker because java.io.IOException: Failed to set permissions of path: /tmp/hadoop-Administrator/mapred/local/taskTracker to 0755
    at org.apache.hadoop.fs.RawLocalFileSystem.checkReturnValue(RawLocalFileSystem.java:525)
    at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:507)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:318)
    at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:183)
    at org.apache.hadoop.mapred.TaskTracker.initialize(TaskTracker.java:630)
    at org.apache.hadoop.mapred.TaskTracker.<init>(TaskTracker.java:1328)
    at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:3430)

各位你们都遇见过这个问题过吗？怎么解决的，谢谢！