Understand mysql user bug115166_XXXXX

[AntoninoD]

Good morning,
I set up a High Availability mysql cluster with 2 nodes and HAproxy for balance the connections, when connect plesk panel 11.5.30 to the mysql server, i see new strange users on the database server.

bug115166_XXXXX (where XXXXX is a number)
u51daYYYYYYYYY (where XXXXX are alphanumeric characters)

I have investigated on this and i found that plesk panel each time make connection to the server, create this users and some databases. After, it delete all.

I found this because my mysql.user tables are not synchronized, so the users that are created on one node, not exists on second node.
After this i have investigate and found this "functionality".

Why plesk create this users?

(My plesk panel version is 11.5.30. The installation is clean from scratch, The server is Centos 6.4, clean and installed from scratch)
I search on forum and i found:
http://forum.parallels.com/showthre...-with-every-login-!&highlight=bug115166_XXXXX
http://forum.parallels.com/showthread.php?113452-Strange-mysql-users&highlight=bug115166_XXXXX

 

[AntoninoD]

http://serverfault.com/questions/31...-10073-and-not-by-me?answertab=active#tab-top

Hello IgorG, my mysql server is configured for production, so it is without test users.
The users bug115166_XXXXX and u51daYYYYYYYYY are created from parallels plesk panel application at connection to the database server.