springboot Manual configuration of WebExceptionHandler via HttpHandler bean definition does not work

I am developing a set of reusable stuff like filters, global exception handlers and other spring webflux components, that would be used by reactive spring apps (webflux)

Since, this is a library (a jar), that will be consumed by apps, I dont want to annotate the global exception handler class with @Configuration and instead would like to let the applications programmatically configure the exception handler as needed. I see from the docs, that the way to configure the WebExceptionHandler is through the HttpHandler as a bean definition for a spring boot application.

```@Configuration public class TestApplicationConfig {

@Bean
public HttpHandler routeHandler(ApplicationContext applicationContext) {
    return WebHttpHandlerBuilder.applicationContext(applicationContext)
            .filter(new TenantContextFilter(),
            .exceptionHandler(new ServiceExceptionHandler())
            .build();
}

}

```//exception handler
@Order(-2)
public class ServiceExceptionHandler implements ErrorWebExceptionHandler {

    @SuppressWarnings("NullableProblems")
    @Override
    public Mono<Void> handle(ServerWebExchange serverWebExchange, Throwable err) {
    }
}

Please note that the filter gets called eventhough I removed @Component annotation from it, so that it doesnt get discovered through auto-configuration. So, the HttpHandler configuration works, but just the exception handler is not kicking in.

Comment From: bclozel

Hello @praburajan could you create a small project that reproduces the issue? The bug or configuration mistake might be in a place that's not obvious from your code snippets. A small project that I can clone/download (something created with start.spring.io) would definitely help.

Thanks!

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