解决windows下运行hadoop客户端报错

1、访问hdfs时报权限错误：

Permission denied: user=administrator, access=WRITE, inode="/":root:supergroup

解决:配置JVA运行参数 -DHADOOP_USER_NAME=对应用户名

2、 Could not locate Hadoop executable: E:\lib\hadoop-2.8.0\bin\winutils.exe -see https://wiki.apache.org/hadoop/WindowsProblems

解决:在https://github.com/steveloughran/winutils 下下载对应hadoop版本win环境运行文件，覆盖bin文件夹

3、org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z

解决:将bin下hadoop.dll拷贝至C:\Windows\System32