WebFlux or MVC app with the Validation API and no implementation fails to start

[wilkinsona]

2019-03-08 17:10:01.946 [main] DEBUG o.s.b.d.LoggingFailureAnalysisReporter - Application failed to start due to an exception
javax.validation.NoProviderFoundException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
    at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:291)
    at org.springframework.boot.validation.MessageInterpolatorFactory.getObject(MessageInterpolatorFactory.java:53)
    at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.create(ValidatorAdapter.java:138)
    at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.getExistingOrCreate(ValidatorAdapter.java:119)
    at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.get(ValidatorAdapter.java:111)
    at org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration$EnableWebFluxConfiguration.webFluxValidator(WebFluxAutoConfiguration.java:243)

[mbhave]

@wilkinsona Not sure if this was intended to be WebFlux specific? I was able to reproduce this for an MVC app as well

javax.validation.NoProviderFoundException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
	at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:291)
	at org.springframework.boot.validation.MessageInterpolatorFactory.getObject(MessageInterpolatorFactory.java:53)
	at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.create(ValidatorAdapter.java:138)
	at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.getExistingOrCreate(ValidatorAdapter.java:119)
	at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.get(ValidatorAdapter.java:111)
	at org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration.mvcValidator(WebMvcAutoConfiguration.java:519)

[wilkinsona]

It wasn’t. Thanks for spotting that MVC is affected too.