Memcached problems “failed to listen on TCP port 11211”

Question

I just installed memcached on my Mac OS X 10.6.8. It installed perfectly and when I type in memcached in Terminal I get this:

failed to listen on TCP port 11211 tcp
listen: Address already in use

And I have a script in my localhost that contains this:

$memcache = new Memcache();

But I get an error thrown saying Fatal error: Class 'Memcache' not found.

How can I get memcached to work, is it because the port 11211 is not listened to which probably doesn't make memcached work?

Answer 1

Your first error is probably because memcached is already running. If you run ps -e | grep memcache | grep -v grep you'll probably see it. The output of netstat -a -p tcp | grep LISTEN will show you all the listening services too, which may help.

The second issue is probably because you don't have a memcache extension installed for your version of PHP (from the error I'm assuming you're using PHP). You probably want http://pecl.php.net/package/memcache to solve that.