I had this problem too: Once on a linux box and once on a HPUX box. The HPUX box will kill the server and restart it. I'm not sure what is going on there. My guess is that I didn't compile it correctly. On my linux box, I fragged the database after restoring it from a pg_dump. I had to start clean. Check your server-error.log file. It might give you some hints as to why your server is dying. My error was that the postgres was restarting. That caused aolserver to hang. I had to restart the server once this happened.