Yes, you can reload all the beam files (even if you have to unsticky them -- you can do that), but that doesn&#x27;t mean r16 -&gt; r17 didn&#x27;t make changes you can&#x27;t safely load. Some parts of OTP have state upgraders, and some don&#x27;t; some may depend on bif&#x2F;nif changes as well.<p>&gt;&gt; I have to use DNS for load balancing [because the load balancers fall over often].<p>&gt;Oh lord. That&#x27;s a terrible situation to be in.<p>It&#x27;s not terrible, it&#x27;s just not great. Our hosting environment is generally very reliable, so if I don&#x27;t screw things up, my systems won&#x27;t fall over. It&#x27;s just their loadbalancers are crap, the suggested upgrade path was run a load balancer in a VM appliance; which seems like maybe I should just run CARP myself on the hosts (or something), instead, and skip a layer, but I&#x27;ll probably never get around to that, because it doesn&#x27;t come up that often :)