Whenever a class has an attribute using more than one generics other than Map (a common Java 8 example would be Function<A, B>), a warning gets logged by the getTypeParameter of org.hibernate.validator.internal.metadata.provider.TypeAnnotationAwareMetaDataProvider.

Since this is not really an error condition, a warning is probably too much here, debug would most likely be more than enough. Furthermore, the message itself is misleading, using a bad message id (188 instead of 184), so the warning currently says: "HV000188: ParameterMessageInterpolator has been chosen, EL interpolation will not be supported" which could be very misleading for users since EL not being present would indeed be a grave issue.

Related forum topic: https://forum.hibernate.org/viewtopic.php?f=9&t=1037350&start=0