When my version was upgraded from 5.2.8.RELEASE to 5.3.33, the resolveBaseUrl method in ReactorServerHttpRequest caused a NoSuchMethodError due to the call to request.hashPort. My project depends on reactor-netty (0.9.10).
Comment From: bclozel
You are using an incompatible version of Reactor. Please use "io.projectreactor:reactor-bom:2020.0.45" instead.
Note that the 5.x generation is about to go out of OSS support. Please upgrade to a supported version, or consider a commercial subscription. See https://spring.io/projects/spring-framework#support