org.apache.hadoop.security.AccessControlException Permission denied: user=anonymous, access=WRITE, inode="/":root:supergroup:drwxr-xr-x
CREATE TABLE pokes (foo INT, bar STRING);
Error: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:Got exception: org.apache.hadoop.security.AccessControlException Permission denied: user=anonymous, access=WRITE, inode="/":root:supergroup:drwxr-xr-x
解决：
hadoop dfsadmin -safemode leave 关闭安全模式
hadoop fs -chmod 775 / 授予权限