To be sure that in case replication were to start I set the MASTER parameters to be wrong so the replication would not work. After doing this, even if I ran `STOP SLAVE` and `STOP SLAVE SQL_THREAD;` the server kept trying to restart replication, causing the log file to fill up.

The only way to get through MySQL's head that I wanted replication to stop was to follow the suggestion in [How do I completely disable MySQL replication][1] and stop the mysql service and delete the `master.info` and `relay-log.info` files.


  [1]: https://dba.stackexchange.com/questions/21119/how-do-i-completely-disable-mysql-replication