Windows本地执行MapReduce程序报错的解决办法

Windows本地执行MapReduce程序报错的解决办法

1、问题描述

 在Windows系统上，本地执行MapReduce程序，报错：

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:606)

2、解决办法

 将源码中的org.apache.hadoop.io.nativeio.NativeIO复制到项目中，注意包名，并修改public static boolean access(String path, AccessRight desiredAccess) throws IOException方法为：

public static boolean access(String path, AccessRight desiredAccess)
    throws IOException {
    String os = System.getProperty("os.name");
    return os.contains("Windows") || access0(path, desiredAccess.accessRight());
}