As a developer, I write long JSPs and sometimes I make mistakes. For example, i can write the line underneath:
if the the field "moraHalfFoodFree" doesn't exists on bean "ghamRestitution", XWork raise a warn such as:
2014/11/25 11:45:08 WARN (CommonsLogger.java:56) warn Could not find property [null]
The problem is that the message always say "Count not find property [null]" and it's very hard for the developer to know where the bug is in a long JSP.
always returns null, instead we should use expr parameter which give the right information.