Improve 500 error handling and reporting in WebFlux [SPR-15506]

[spring-projects-issues]

Rossen Stoyanchev opened SPR-15506 and commented

HttpWebHandlerAdapter has a debug message only.

ExceptionHandlingWebHandler has an error level message + extra smarts around suppressing "Broken Pipe" errors. However that only applies to DispatcherHandler setup, and not a typical setup with the functional web framework.

We need to centralize move the final 500 error and related logging to HttpWebHandlerAdapter.

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Affects: 5.0 M5

Issue Links:

• Common root cause introspection algorithm in NestedExceptionUtils [SPR-15510] #20069 Common root cause introspection algorithm in NestedExceptionUtils