On two different occasions and on two different servers I have found server debug information written out to the mysqld.log file.
Now I know that by issuing the kill -1 mysql-pid will write that information to the mysqld.log file, and by using mysqladmin debug will also write debug information to the mysqld.log file.
I am wondering what other methods would write the debug info to the mysqld.log file. On the two servers in question my fellow DBA's nor myself did nothing that would have written debug info.
Are there any internal settings or processes that would write debug information to the mysqld.log file? Could a client tool do something like this? We have reviewed the app privileges and the they have no ability to write debug info.