http://u.qdnx.org/file/erkan-20150207T215828-cuzu6bh.html
without looking at your logs, AND if it's due to !gs (e.g. not something from your OS, hoster, ...) sounds like something with queue daemons (1). They get and send msgs. BUT, before you do anything, check your logs, if you see errors or so. (1) http://www.skilledtests.com/wiki/Statusnet_problems#start_the_queue_daemons