1.在安装mysql 5.6.15时，安装完成后，后台日志报如下警告信息：
2014-01-08 13:47:34 22946 [Warning] InnoDB: Cannot open table mysql/slave_master_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2014-01-08 13:47:34 22946 [Warning] Info table is not ready to be used. Table 'mysql.slave_master_info' cannot be opened.2014-01-08 13:47:34 22946 [Warning] InnoDB: Cannot open table mysql/slave_worker_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2014-01-08 13:47:34 22946 [Warning] InnoDB: Cannot open table mysql/slave_relay_log_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2014-01-08 13:47:34 22946 [Warning] Info table is not ready to be used. Table 'mysql.slave_relay_log_info' cannot be opened.
.......
2014-01-08 13:49:33 22946 [Warning] InnoDB: Cannot open table mysql/innodb_index_stats from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2014-01-08 13:49:49 7f3ae82a5700 InnoDB: Error: table `mysql`.`innodb_index_stats` does not exist in the InnoDB internal
2.问题产生原因：具体原因目前不详，网上查找到的资料:数据库打开这几张表的默认引擎为MyISAM，但是这几张表在建表时的引擎为INNODB
但是能确定的，这几张表确实是在mysql5.6中新入的
innodb_index_stats,
innodb_tables_stats,
slave_master_info,
slave_relay_log_info,
slave_worker_info
3.解决方法：
(1) 登录数据库，进入mysql库，执行如下SQL删除5张表
记住，一定要是drop table if exists
drop table if exists innodb_index_stats;
drop table if exists innodb_table_stats;
drop table if exists slave_master_info;
drop table if exists slave_relay_log_info;
drop table if exists slave_worker_info;
如下是执行的结果，忽略你看到的Warning信息
admin@localhost : mysql 02:12:26> drop table if exists innodb_index_stats;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Warning (Code 155): Table 'mysql.innodb_index_stats' doesn't exist
admin@localhost : mysql 02:12:26> drop table if exists innodb_table_stats;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Warning (Code 155): Table 'mysql.innodb_table_stats' doesn't exist
admin@localhost : mysql 02:12:26> drop table if exists slave_master_info;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Warning (Code 155): Table 'mysql.slave_master_info' doesn't exist
admin@localhost : mysql 02:12:27> drop table if exists slave_relay_log_info;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Warning (Code 155): Table 'mysql.slave_relay_log_info' doesn't exist
admin@localhost : mysql 02:12:27> drop table if exists slave_worker_info;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Warning (Code 155): Table 'mysql.slave_worker_info' doesn't exist
执行完后，可以用show tables查看一下，看表的数据是否已经比删除之前减少了，如果减少了，说明你成功了！
(2)面这一部操作完成后，停止数据库，并进入到数据库数据文件所在目录，删除表面5个表所对应的idb文件，如下所示：
[mysql@test /data/mysqldata3/mydata/mysql]ls *.ibd
innodb_index_stats.ibd innodb_table_stats.ibd slave_master_info.ibd slave_relay_log_info.ibd slave_worker_info.ibd
[mysql@teset /data/mysqldata3/mydata/mysql]rm -f *.ibd
(3) 重新启动数据库，进入到mysql库，重建上面被删除的表结构：
数据库的建设表脚本在mysql软件的安装目录的share目录下，我的mysql软件的安装路径为/usr/test/mysql
admin@localhost : (none) 02:23:03> use mysql
Database changed
如下是执行建表脚本前表的数量：
admin@localhost : mysql 02:23:48> source /usr/test/mysql/share/mysql_system_tables.sql
admin@localhost : mysql 02:23:50> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
23 rows in set (0.00 sec)
如下为执行建表脚本后，表的数量
admin@localhost : mysql 02:23:46> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| innodb_index_stats |
| innodb_table_stats |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
28 rows in set (0.00 sec)
(4) 用show create table命令查看表时，也完正常，后台日志中也不再报与上面提到的5张表相关的错误，到此，问题全部解决！
后记：在后面的环境中，配置双主架构时，又遇到了如下问题：
error:
ERROR 1794 (HY000): Slave is not configured or failed to initialize properly. You must at least set --server-id to enable either a master or a slave. Additional error messages can be found in the MySQL error log.
最后通过如下的操作解决的问题，具体原因还尚未清楚
(1)登录数据库后，删除5张表，并重新导入脚本
use mysql
drop table slave_master_info;
drop table slave_relay_log_info;
drop table slave_worker_info;
drop table innodb_index_stats;
drop table innodb_table_stats;
source /usr/coolpad/mysql/share/mysql_system_tables.sql
(2)重新启动数据库
注：这一步是必须的，否则无法正常配置双主架构。