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