It's working well for us but we occasionally get blips where for very short periods of time messages get "stuck" in between application code events on different

It's working well for us but we occasionally get blips where for very short periods of time messages get "stuck" in between application code events on different servers and we cannot figure out why. It's very rare. Maybe a burst of 5 messages every 10 million messages. Any ideas on how to even debug this type of thing? Help! We think it might be a tcp connection failure but we have no idea.