無限ループのなぞ

Java JSF

MyFacesを使っていて、下のようにweb.xmlでマッピングをして、

web.xml
    <servlet-mapping>
        <servlet-name>FacesServlet</servlet-name>
        <url-pattern>/hoge.jsp</url-pattern>
    </servlet-mapping>

アプリケーションルートに配置したhoge.jspに

  http://localhost:8080/hoge/hoge.jsp

とアクセスすると、

[ERROR] 2005-09-22 02:07:10 ApplicationContext#log() Exception in FacesServlet
java.lang.StackOverflowError
	at org.apache.catalina.connector.Request.doGetSession(Request.java:2160)
	at org.apache.catalina.connector.Request.getSession(Request.java:2017)
	at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:822)
	at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:215)
	at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544)
	at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:215)
	at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544)
	at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:215)
	at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544)
        ...(省略)...
	at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544)
	at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:215)
	at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544)
	at org.apache.myfaces.context.servlet.SessionMap.getSession(SessionMap.java:80)
	at org.apache.myfaces.context.servlet.SessionMap.getAttribute(SessionMap.java:51)
	at org.apache.myfaces.context.servlet.AbstractAttributeMap.get(AbstractAttributeMap.java:101)
	at org.apache.myfaces.application.jsp.JspStateManagerImpl.getSerializedViewFromServletSession(JspStateManagerImpl.java:339)
	at org.apache.myfaces.application.jsp.JspStateManagerImpl.restoreTreeStructure(JspStateManagerImpl.java:192)
	at org.apache.myfaces.application.jsp.JspStateManagerImpl.restoreView(JspStateManagerImpl.java:217)
	at org.apache.myfaces.application.jsp.JspViewHandlerImpl.restoreView(JspViewHandlerImpl.java:301)
	at org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.java:129)
	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:82)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:109)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:405)
	at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:280)
	at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:110)
        ...(省略)...

と、これでもかっというくらい無限ループするんだけど何で？
hoge.jspの内容は

  HOGEHOGEHOGE

って書いてるだけなのに。