I've got the error only when I run my WebApp under IntelliJ, when I try with Jbuilder, I've got no problem. The source of the error is a page : sidebar.jsp which holds a lot of "<logic:equal>" block.
The error appeared when I add a new "<logic:equal>" block.
When I delete some of the code(simple html) into one of these block, the error disappear...
Can somebody help me ? :)