ecliplse 远程提交程序到虚拟机 hadoop集群 ， 修改Hadoop的源代码---NativeIO问题解决!

 
 环境: windows 2008 64的位的ecliplse 运行hadoop wordcount


1.已经配置了log4j.properties


2.运行又 出错了
Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:557)
at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:977)

at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:187)

3.检查:已经配置了winutiles, hadoop.dll


4.百度,要修改hadhoop的源代码(http://www.itnose.net/detail/6177732.html) 
  在出现错误的的atorg.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:557)我们来看这个类NativeIO的557行
Windows的唯一方法用于检查当前进程的请求，在给定的路径的访问权限， 允许访问， 先修改源代码，return true 时允许访问


    public static boolean access(String path, AccessRight desiredAccess)
        throws IOException {
    return true;
     //return access0(path, desiredAccess.accessRight());
    }

5.新建包org.apache.hadoop.io.nativeio,复制文件NativeIO,运行ok