JSP views rendering 0 bytes and HTTP 200

[lkoskela]

I've got a weird problem I haven't been able to figure out.

Using the following viewResolver configuration renders a pretty Velocity template:

<bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.Velo cityConfigurer">
<property name="resourceLoaderPath" value="/WEB-INF/velocity/"/>
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.Velo cityViewResolver">
<property name="cache" value="true"/>
<property name="prefix" value=""/>
<property name="suffix" value=".vm"/>
</bean>

For example, new ModelAndView("foo") renders the template from /WEB-INF/velocity/foo.vm.

However, when I tried to create a similar configuration for rendering JSP's (and commented out the Velocity stuff), I'm getting a HTTP 200 with no content at all.

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResou rceViewResolver">
<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
<property name="prefix"><value>/WEB-INF/jsp/</value></property>
<property name="suffix"><value>.jsp</value></property>
</bean>

Trying to access the URL http://localhost:8080/myapp/foo.html (I've mapped the DispatcherServlet to "*.html") results in the following log output:

[org.springframework.web.servlet.DispatcherServlet ] - <Testing handler map [org.springframework.web.servlet.handler.BeanNameU rlHandlerMapping@5a67c9] in DispatcherServlet with name 'app'>
[org.springframework.web.servlet.handler.BeanNameU rlHandlerMapping] - <Looking up handler for [/list.html]>
[org.springframework.web.servlet.DispatcherServlet ] - <Testing handler adapter [org.springframework.web.servlet.mvc.SimpleControl lerHandlerAdapter@153c375]>
[org.springframework.web.servlet.DispatcherServlet ] - <Last-Modified value for [/myapp/list.html] is [-1]>
[org.springframework.web.servlet.DispatcherServlet ] - <DispatcherServlet with name 'app' received request for [/myapp/list.html]>
[org.springframework.web.servlet.DispatcherServlet ] - <Testing handler adapter [org.springframework.web.servlet.mvc.SimpleControl lerHandlerAdapter@153c375]>
[org.springframework.web.servlet.view.InternalReso urceViewResolver] - <Cached view 'list'>
[org.springframework.web.servlet.DispatcherServlet ] - <Rendering view [org.springframework.web.servlet.view.JstlView: name 'list'; URL [/WEB-INF/jsp/list.jsp]] in DispatcherServlet with name 'app'>
[org.springframework.web.servlet.view.JstlView] - <Rendering view with name 'list' with model {list=[First, Second, Third]} and static attributes {}>
[org.springframework.web.servlet.view.JstlView] - <Added model object 'list' of type [java.util.ArrayList] to request in InternalResourceView 'list'>
[org.springframework.web.servlet.view.JstlView] - <Forwarded to resource [/WEB-INF/jsp/list.jsp] in InternalResourceView 'list'>
[org.springframework.web.servlet.DispatcherServlet ] - <Successfully completed request>
[org.springframework.web.context.support.XmlWebApp licationContext] - <Publishing event in context [WebApplicationContext for namespace 'app-servlet']: RequestHandledEvent: url=[/myapp/list.html]; time=[871ms]; client=[127.0.0.1]; method=[GET]; servlet=[app]; session=[null]; user=[null]; status=[OK]>
[org.springframework.web.context.support.XmlWebApp licationContext] - <Publishing event in context [Root WebApplicationContext]: RequestHandledEvent: url=[/myapp/list.html]; time=[871ms]; client=[127.0.0.1]; method=[GET]; servlet=[app]; session=[null]; user=[null]; status=[OK]>

What wonders me is that the log clearly claims the request was forwarded to "/WEB-INF/jsp/list.jsp" but the JSP is never rendered. Instead, as I mentioned already, I get 0 bytes of content and a HTTP 200 response code.

Here's the web.xml stuff that maps the request to the controller:

<servlet>
<servlet-name>app</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>app</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>


Any help is obviously appreciated. Especially if it makes me slap my forehead ;-)

[irbouho]

Do you receive this same error for all jsps?

[lkoskela]

Well, I only had 2 JSP's at the time -- an index.jsp which redirected to a URL mapped to a controller, which would then forward the request to the other JSP. It was that other JSP that wasn't rendering anything (i.e. not executing at all).

I have to apologize, though. I eventually solved the problem by downgrading from Tomcat 5.5.9 to 5.0.28 on which everything works smoothly -- the same code, the same configuration, everything.