EL隐式对象无法识别

Question

在session我的拦截器中设置一些值，我确定someValue有会话。

session.setAttribute("someValue", settingSomeValueHere);

<c:out value="${sessionScope.someValue}"/> is printing like 
${sessionScope.someValue} in my JSP output.

但我可以获得相同的价值     <%= session.getAttribute("someValue")%>

在我的jsp中，添加了类似

的tld

<%@ taglib uri="/WEB-INF/tld/fmt.tld" prefix="fmt" %>
<%@ taglib prefix="c" uri="/WEB-INF/tld/c.tld" %>
<%@ taglib uri="/WEB-INF/tld/fn.tld" prefix="fn" %>

下面是我战争中的罐子里面的罐子。怀疑是，是否有与此相关的不必要的罐子？

使用tomcat 7.0，在服务器启动时找到了一些日志

INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.