Message Title

Alternatively, a more stable solution could be to use programmatic mapping API for everything and remove the XML + ServiceLoader:

final HibernateValidatorConfiguration configuration = Validation.byProvider( HibernateValidator.class ).configure();
ConstraintMapping constraintMapping = configuration.createConstraintMapping();
configuration.addMapping( constraintMapping );

constraintMapping.constraintDefinition( AnyUuid.class )
		.includeExistingValidators( true )
		.validatedBy( AnyUuid.AnyUuidValidator.class );

constraintMapping.type( mwe.validatorfail.dto.SampleDTO.class ) // instead of an XML
		.getter( "uuid" )
		.constraint( new AnyUuidDef() )
		.constraint( new NotNullDef() );