ndomod: Could not open data sink! I'll keep trying, but some output may get los

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　　错误内容①：
　　[1429500851] ndomod: Could not open data sink!  I'll keep trying, but some output may get lost...
　　[1429500851] ndomod registered for contact data'
　　[1429500851] ndomod registered for contact notification data'
　　[1429500851] Event broker module '/usr/local/nagios/bin/ndomod.o' initialized successfully.
　　-------------------
　　错误原因：貌似库cacti没有授权用户cacti@localhost
　　mysql> use mysql;

　　mysql> select user,host from user where user='cacti';
　　mysql> grant all on cacti.* to cacti@localhost identified by '123456' ; flush privileges;

　　mysql> select user,host from user where user='cacti';
　　+-------+-----------+
　　| user  | host      |
　　+-------+-----------+
　　| cacti | %         |
　　| cacti | localhost |
　　+-------+-----------+
　　2 rows in set (0.00 sec)
　　--------------------

　　按照上面的方法处理之后，还是报错，通过下面的命令，修改一下权限，ok了。
　　错误原因：cp的两个配置文件权限不对。
　　[root@kongxl nagios]# chown -R nagios:nagios /usr/local/nagios/