title: No handler found for portlet request: mode 'view', phase 'RENDER_PHASE'
body: <p>I develop a portlet in Spring MVC which is deployed in Liferay. Apparently, I have a problem with render phase of view mode of portlet. </p>
  
  <p><strong>Controller for view mode</strong> </p>
  
  <pre><code>package graphui.controller;
  
  import javax.portlet.ActionRequest;
  import javax.portlet.ActionResponse;
  import javax.portlet.RenderRequest;
  import javax.portlet.RenderResponse;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.ModelMap;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.portlet.ModelAndView;
  import org.springframework.web.portlet.bind.annotation.ActionMapping;
  import org.springframework.web.portlet.bind.annotation.RenderMapping;
  
  /**
   *
   * Controller for VIEW mode of portlet.
   */
  @Controller("graphViewController")
  @RequestMapping(value = "VIEW")
  public class GraphViewController{
  
      @ActionMapping
      public void handleActionRequest(ActionRequest request, ActionResponse response)throws Exception {
          return;
      }
  
      @RenderMapping
      public ModelAndView handleRenderRequest(RenderRequest request, RenderResponse response, ModelMap model) {
  
        model.addAttribute("nodes", "123");
        model.addAttribute("edges", "123");
        return new ModelAndView("index", model);
  
      }
  
  }
  </code></pre>
  
  <p><strong>index.jsp</strong></p>
  
  <pre><code>&lt;%@page contentType="text/html" pageEncoding="UTF-8"%&gt;
  &lt;%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%&gt;
  &lt;%@ taglib prefix="c" 
             uri="http://java.sun.com/jsp/jstl/core" %&gt;
  &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
     "http://www.w3.org/TR/html4/loose.dtd"&gt;
  
  &lt;html&gt;
      &lt;head&gt;
  
      &lt;/head&gt;
  
      &lt;body&gt;
  
      &lt;/body&gt;
  
        &lt;script type="text/javascript"&gt;
  
              var nodes = ${nodes};
              var edges = ${edges};
  
        &lt;/script&gt;
  
  &lt;/html&gt;
  </code></pre>
  
  <p><strong>Tomcat log output</strong></p>
  
  <pre><code>ERROR [http-bio-8080-exec-29][render_portlet_jsp:132] null
  org.springframework.web.portlet.NoHandlerFoundException: No handler found for portlet request: mode 'view', phase 'RENDER_PHASE', parameters map[[empty]]
      at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
      at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:103)
      at com.liferay.portlet.ScriptDataPortletFilter.doFilter(ScriptDataPortletFilter.java:55)
      at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:100)
      at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:64)
      at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:112)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
      at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
      at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
      at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
      at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605)
      at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544)
      at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:604)
      at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:677)
      at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:379)
      at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1230)
  </code></pre>
  
  <p>Does anybody know where could be the problem? Thank you.</p>