We were told ELBs are explicitly not designed for long-running connections when we ran into this exact same issue so know that you will always be working around this design constraint if you do long-running connections through ELBs.<p>There&#x27;s another case that the article doesn&#x27;t really discuss (though the evidence of it is in the beginning when all connections drop simultaneously) where the ELB nodes themselves scale vertically at a particular threshold. I believe the setup described is still vulnerable to those scaling events.