1. org.apache.hadoop.security.AccessControlException: Permission denied: user=opsuser, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x
方案1：
<property>
<name>dfs.permissions</name>
<value>false</value> </property>
方案2：
http://spryinc.com/blog/hdfs-permissions-overcoming-permission-denied-accesscontrolexception
原文：http://www.cnblogs.com/yako/p/5195093.html