Initially I used method validation from Hibernate Validator 4.3.1.Final through interception.Turned out that method validation sometimes pass bad values.

After simplifying and researching I got:

• It appears when one of param List<>
• It appears when method is enhanced
• it works if that param is Array, not List<>
• checked Hibernate Validator 5 - there is no such problems
• from debugger I saw that the issue in beanCacheManager that sometimes doesn't have constraints

Interesting thing that it works in ~half of cases. I wrote tests that performs validation for a single method with the same params 100 times. And here is the result:

Failed tests:
testValidateMethodWithListOfPrimitives(com.omaha.hibernate.ValidationExampleTest): validated mismatch expected:<0> but was:<52> 
testValidateMethodWithListOfEntities(com.omaha.hibernate.ValidationExampleTest): validated mismatch expected:<0> but was:<39>

I duplicate here how I used core validation method from attachments:

private Validator getValidator() {
    return Validation.byProvider(HibernateValidator.class).configure().buildValidatorFactory().getValidator();
}

public Boolean validate(Object o, Method method, Object[] args) {
    return getValidator().unwrap(MethodValidator.class).validateAllParameters(o, method, args).isEmpty();
}

You can see the full test code in attachments.
Thanks.