yugj

same situation，finally i use RetryGatewayFilterFactory instead, Waiting for others to answer ==！

中文描述：spring cloud gateway网关调用下游，如果网关或者下游都配置了H2C，会导致如上错误，一方关闭后，就没有问题 若是GET请求，即使双方都开始H2C也是OK的

This seems to trigger the Tomcat9 DDoS protection policy by this [artical](https://stackoverflow.com/questions/61413934/http2-err-connection-closed-too-much-overhead). The following configuration solves this problem, @violetagg thanks a lot ``` @Bean public ConfigurableServletWebServerFactory tomcatCustomizer() { TomcatServletWebServerFactory factory...