We're using pretty simple MASTER->SLAVE MySQL query-based replication.
Every midnight a cron script on the slave stops the replication SQL_THREAD, backs up the slaves databases with mysqldump and then restarts the replication SQL_THREAD.
After replication restarts though, it immediately stops, with this errornous output in SHOW SLAVE STATUS\G
Last_Errno: 1062 Last_Error: Error 'Duplicate entry '54149' for key 1' on query. Default database: 'dbname'. Query: 'insert into emails (emailsubject,emailmessage,html) values (blah','blah', false);'
It seems like the problem is that the replication log on the slave is replaying statements it has already processed.
MySQL bug tracker seems to agree with me: http://bugs.mysql.com/bug.php?id=38205#c200483
Because replication seems like such a basic and standard procedure, my question is: how do we get around replication trying to replay statements?
Addendum: I wanted to use the tags 'start-stop' and 'replaying' and 'statements' to create this post, but my reputation isnt high enough (seems silly?)