Another mysqld server running on port 3306 error [

Question

I have installed Mysql 5.1 on Mac OS X 10.7 Lion. For some reason, though, when I try starting the server with the command "mysqld" I get an error in the log file which says:

120328 21:32:40 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use

120328 21:32:40 [ERROR] Do you already have another mysqld server running on port: 3306 ?

120328 21:32:40 [ERROR] Aborting

If I run "netstat -nat | grep 3306" in my terminal, I get the following:
tcp4 0 0 *.3306 . LISTEN

UPDATE:

So here's the output for that.
mysqld 24645 sb1752 12u IPv4 0xffffff8010f6bde0 0t0 TCP *:mysql (LISTEN)

This is odd though! Because my mysql server is not started.
When I type "mysql" in command line, it says
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

I did install other version of mysql and uninstalled earlier today. Any idea what to do here?

Answer 1

use lsof -i TCP:3306 to check which program binds port 3306

Answer 2

You could use netstat -lp | grep 3306 to find out what program is already listening on port 3306 (you should see PID/Program name in last column) and stop that (maybe mysql is already running?).

Alternatively you could start the newly installed server on a different port. (edit my.cnf and change the default port there)