JSTL will fail with tags using x:out nested in a x:forEach ---------------------------------------------------------- Key: WFLY-6267 URL: https://issues.jboss.org/browse/WFLY-6267 Project: WildFly Issue Type: Bug Components: Web (Undertow) Reporter: Matthew Casperson Assignee: Stuart Douglas See https://github.com/mcasperson/wildfly_jstl_bug/ What happens is you have a x:forEach in a JSP page. Inside this x:forEach you call a tag that itself has a x:forEach. The variable created by the second x:forEach is inaccessible to any nested x:out elements. This happens because the x:out pageContext is actually linked to the pageContext from the jsp page, which doesn't hold any variables created by the x:whatever elements in the tag file. See https://github.com/mcasperson/wildfly_jstl_bug/blob/master/src/main/webap... and https://github.com/mcasperson/wildfly_jstl_bug/blob/master/src/main/webap... for more details.