[Zope] unlinking stale socket?

Hi My zopeinstance went down and I was getting an 'upstream server' unknown message from apache. On restarting zope from ./zopectl this was the message I got..... unlinking stale socket /home/zopeinstance/var/zopectl/sock,sleep/ No handlers could be found for logger 'root' Does anyone have any idea on how to prevent this at all, or what happened here? Thanks Michael