Hadoop应用开发，常见错误

错误1：在windows执行mr

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:570)

解决办法：

1.下载hadoop源码文件，找到org\apache\hadoop\io\nativeio\NativeIO.java源码的570行;

2.修改源代码NativeIO.java

// return access0(path, desiredAccess.accessRight());
return true;

并将此文件放到相应的工程的源码目录下，package也要一样；

3.重新执行;