windows下hadoop中启动tasktracker的问题-Java问题

Problem starting tasktracker in hadoop under windows(windows下hadoop中启动tasktracker的问题)

本文介绍了windows下hadoop中启动tasktracker的问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试在 windows 下使用 hadoop，但当我想启动 tasktracker 时遇到了问题.例如:

I am trying to use hadoop under windows and I am running into a problem when I want to start tasktracker. For example:

$bin/start-all.sh

然后日志写道:

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)

有什么问题?我该如何解决这个问题?谢谢！

What's the problem? How can I solve this? Thanks!

推荐答案

我在 Windows 服务器上安装 1.0.3 时遇到了这个问题.我更改了 hdfs-site.xml 中的默认目录，以便 hadoop 为 dfs 创建的目录是 cygwin 目录的子目录，如下所示...

I was running into this issue on an installation of 1.0.3 on Windows server. I changed the default directory in hdfs-site.xml so that the directory that hadoop creates for the dfs is a subdir of the cygwin directory like this...

...

 <property>
    <name>dfs.name.dir</name>
    <value>c:/cygwin/usr/mydir/dfs/logs</value>
 </property>
 <property>
    <name>dfs.data.dir</name>
    <value>c:/cygwin/usr/mydir/dfs/data</value>
 </property>
</configuration>

这似乎解决了问题.

配置文件的 apache 文档在这里

The apache documentation for the config files is here

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