使用版本是5.6.22
异常：
Caused by: : Received error packet: errno = 1236, sqlstate = HY000 errmsg = Slave can not handle replication events with the checksum that master is configured to log; the first event 'mysql-bin.000001' at 3065, the last event read from '.\mysql-bin.000001' at 3065, the last byte read from '.\mysql-bin.000001' at 120./blog/1329616
/topic/1129002 七锋已经fix了canal的，要合到dbsync里面。
/pdb/mysql/201404/
/blog/2014/04/29/disabling-binlog-checksum-for-mysql-5-dot-5-slash-5-dot-6-master-master-replication/
查询资料发现mysql版本为5.6时，
这个错误一般出现在master5.6,slave在低版本的情况下。这是由于5.6使用了crc32做binlog的checksum；
当一个event被写入binary log(二进制日志)的时候，checksum也同时写入binary log，然后在event通过网络传输到从服务器(slave)之后，再在从服务器中对其进行验证并写入从服务器的relay log.
由于每一步都记录了event和checksum，所以我们可以很快地找出问题所在。
在master1中设置binlog_checksum =none；
mysql> show variables like "%sum%";
+---------------------------+--------+
| Variable_name | Value |
+---------------------------+--------+
| binlog_checksum | CRC32 |
| innodb_checksum_algorithm | innodb |
| innodb_checksums | ON |
| master_verify_checksum | OFF |
| slave_sql_verify_checksum | ON |
+---------------------------+--------+
5 rows in set (0.00 sec)
mysql> set global binlog_checksum='NONE'
Query OK, 0 rows affected (0.09 sec)
mysql> show variables like "%sum%";
+---------------------------+--------+
| Variable_name | Value |
+---------------------------+--------+
| binlog_checksum | NONE |
| innodb_checksum_algorithm | innodb |
| innodb_checksums | ON |
| master_verify_checksum | OFF |
| slave_sql_verify_checksum | ON |
+---------------------------+--------+重启mysql