hadoop2.2.0单机伪分布，运行Wordcount时候出错

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ERROR security.UserGroupInformation: PriviledgedActionException as:root cause:org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=root, access=WRITE, inode="staging":dandan:supergroup:rwxr-xr-x org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=root, access=WRITE, inode="staging":dandan:supergroup:rwxr-xr-x at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.security.AccessControlException: Permission denied: user=root, access=WRITE, inode="staging":dandan:supergroup:rwxr-xr-x at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check

解决办法：

是权限问题。可以选择关闭hadoop权限，在hdfs-site.xml文件中添加<property>    <name>dfs.permissions</name>    <value>false</value>    </property>关闭hadoop权限管理。再不行请切换到root用户操作

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