Comment 19 for bug 1296194

Changes in MySQL 5.6.17 (2014-03-27)
https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-17.html

Replication: When a slave was configured with replication filters and --log-warnings=2, every statement which was filtered caused an entry to be written in the error log. For busy servers which generated many statements to be filtered, the result was that the error log could quickly grow to many gigabytes in size. Now a throttle is used for such errors, so that an error message is printed only once in a given interval, saying that this particular error occurred a specific number of times during that interval. (Bug #17986385)