Hadoop應用開發，常見錯誤

錯誤1：在windows執行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)

解決辦法：

1.下載hadoop源碼文件，找到org\apache\hadoop\io\nativeio\NativeIO.java源碼的570行;

2.修改源代碼NativeIO.java

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

並將此文件放到相應的工程的源碼目錄下，package也要一樣；

3.重新執行;