Just in case someone needs it, there is a "bug" in tomcat 8 EL implementation which converts empty request parameters into empty strings (instead of nulls)
http://stackoverflow.com/questions/33334192/tomcat-8-coerce-behaviour-null-strings-are-incorrectly-set-as-empty-strings -- View this message in context: http://tomee-openejb.979440.n4.nabble.com/TomEE-7-0-0-M1-is-here-tp4677208p4677245.html Sent from the TomEE Users mailing list archive at Nabble.com.
