/tags/tomcat/ Recent content in tomcat on Hugo -- gohugo.io en Fri, 03 Jul 2026 00:20:00 +0800 /posts/spring-cloud-gateway-413-h2c-upgrade/ Fri, 03 Jul 2026 00:20:00 +0800 /posts/spring-cloud-gateway-413-h2c-upgrade/ The symptom A production mystery: file uploads through a Spring Cloud Gateway (Server MVC, servlet stack) — POST /api/file/upload, multipart/form-data — behaved like this: With 1 gateway pod: 413 never happens; Scaled to 3 gateway pods: intermittent 413 PAYLOAD_TOO_LARGE, gateway log: "logger": "o.s.web.servlet.DispatcherServlet", "message": "Completed 413 PAYLOAD_TOO_LARGE" Scale back to 1 pod, problem disappears; The gateway was freshly deployed and its pods homogeneous; the upload backend ran 3 pods, also homogeneous.