Bean validation is done twice in JAX-RS application --------------------------------------------------- Key: WFLY-12668 URL: https://issues.redhat.com/browse/WFLY-12668 Project: WildFly Issue Type: Bug Components: Bean Validation, EJB, REST Affects Versions: 17.0.1.Final, 18.0.0.Final Environment: OpenJDK 11, reproduced on Win10 and Ubuntu 18.x Reporter: Daniel Munzinger Assignee: Bartosz Baranowski Priority: Major If a JAX-RS resource is implemented as a stateless session bean then the validation is done twice: first on the EJB proxy and on the real implementation. This results in two constraint errors although there is basically just one error. The interesting part: If you resend the request. Then you get a proper result with just one violation. If you do a valid request and then an invalid you get the two violations again (see also the reproduce section). I created the issue here because I think it is an integration issue with JAX-RS, bean validation and EJBs.