When I was setting up HAProxy running on our Kubernetes cluster, I defined the log format as JSON and I got a lot of BADREQ logs with status code 400 as follows. 1{ 2 "conn": { 3 "act": 7, 4 "fe": 7, 5 "be": 0, 6 "srv": 0 7 }, 8 "queue": { 9 "backend": 0, 10 …