log event entry exceeded max_allowed_packet

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现象：
[ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master', Error_code: 1236
[Note] Slave I/O thread exiting, read up to log 'mysql-bin.000012', position 7985

解决办法：
1.分别在Master和slave上增加max_allowed_packet

Master:
mysql> select @@global.max_allowed_packet/1024/1024 MB;
+-------------+
| MB |
+-------------+
| 16.00000000 |
+-------------+
1 row in set (0.00 sec)

mysql>set @@global.max_allowed_packet=32*1024*1024;

mysql> select @@global.max_allowed_packet/1024/1024 MB;
+-------------+
| MB |
+-------------+
| 32.00000000 |
+-------------+
1 row in set (0.00 sec)

Slave:
mysql>stop slve;
mysql>set @@global.max_allowed_packet=32*1024*1024;
mysql>start slave;

2.分别在Master和slave的my.cnf中设置max_allowed_packet
max_allowed_packet = 32M

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