On Wed, 20 Jul 2011, Ljubomir Ljubojevic wrote: > To: CentOS mailing list <centos at centos.org> > From: Ljubomir Ljubojevic <office at plnet.rs> > Subject: Re: [CentOS] MySQL ERROR - UNKNOWN_MYSQL_USER > > Keith Roberts wrote: >> This is strange behavior because as soon as I start mysqld >> with a clean error log, I get the following messages: >> >> 110720 21:38:47 [Note] /usr/libexec/mysqld: ready for >> connections. >> Version: '5.5.14-log' socket: '/var/lib/mysql/mysql.sock' >> port: 2500 MySQL Community Server (GPL) by Remi >> >> 110720 21:38:48 [Warning] Access denied for user >> 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO) >> >> The strange things is, AFAIK there are no clients trying to >> connect to mysql. I shutdown a mysql CLI monitor I had >> running, and did the restart again. >> >> So I'm just wondering why I get this message, when AFAIK >> there is nothing that should be trying to connect to mysql - >> unless it's a server daemon running somewhere? >> >> Has anyone else come across this funny error message? >> > > There must be some service that does uses MySQL but does > not have user set. Website like CMS? Try getting more logs > to see what app/script uses it. Hi Ljubomir. It might be collectd that can use mysql. The man page is over 5,000 pages for the config file. I seem to remember seeing a message at boot time about collectd not being configured properly to use mysql. I installed collectd recently, so I could monitor my HDD temperatures using GKrellM, which it's doing OK. I'll leave this for another day! Kind Regards, Keith ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------