WebFlux doesn't render HTTP status error templates

[butterfly-valley]

When I try to create a demo project on spring initializr and choose spring-boot-starter-webflux I can't for my life customize my error pages. I have tried putting the templates under /resources/public/error, /resources/templates/error (I am using Thymeleaf), defining a custom ErrorController to no avail. Each time I want to throw a 404 page for example the application throws the WhiteLabel page. BUT when I change the dependency to spring-boot-starter-web it picks my templates right away.

Is there some other way of declaring the error pages or this is just a bug (currently using Spring Boot 2.1.0.RELEASE)?

I eventually remedied the issue by falling back to 2.0.5 but it is no solution.

Thanks in advance.

Copy of the issue on stackoverflow

[bclozel]

Since SPR-16898, the toString implementation of HttpStatus has been changed, and unfortunately, we were relying on that to resolve the HTTP status view names instead of just using the HttpStatus.value().

We need to fix that in DefaultErrorWebExceptionHandler and add tests for this.

[bclozel]

Note: there is no issue with Spring Boot 2.0.6.RELEASE - the Thymeleaf error pages aren't working there but for a different reason (see SPR-17407). This has been solved in #14920 and upgrading Thymeleaf to 3.0.11.RELEASE should work.

This issue only affects Spring Boot 2.1.0.RELEASE.