The correct location is /META-INF/validation.xml and the online docs should indeed be a little clearer. Do you have debug log enabled? If so you would have been able to see:
DEBUG ValidationXmlParser:88 - Trying to load META-INF/validation.xml for XML based Validator configuration.
DEBUG ValidationXmlParser:91 - No META-INF/validation.xml found. Using annotation based configuration only.
No excuse for an ambiguous documentation, but maybe it is a good idea to use debug logging during development.
The correct location is /META-INF/validation.xml and the online docs should indeed be a little clearer. Do you have debug log enabled? If so you would have been able to see:
No excuse for an ambiguous documentation, but maybe it is a good idea to use debug logging during development.