NPE thrown when trying to add a hot deployed portlet to a Pluto page
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Key: PLUTO-281
URL: http://issues.apache.org/jira/browse/PLUTO-281
Project: Pluto
Issue Type: Bug
Components: portal driver, portlets-admin
Affects Versions: Current CVS
Reporter: Craig Doremus
Fix For: 1.1.0
Adding a hot deployed portlet to a page using the Page Administrator Portlet
results in a NullPointerException which points to line 161
PortletModeAnchorTag.java (see stack trace below). The hot deployment was done
using the Tomcat manager application.
The proximal cause of this problem is a null PortletWindowConfig object.
However, if a portlet-app record for this portlet is added to
pluto-portal-driver-config.xml, and Pluto is restarted, the portlet can be
sucessfully added to a portal page using the Page Administrator.
Althought null checks can fix the problem in the PortletModeAnchorTag class,
the root problem is that we need to notify users of this problem and its
solution. I have found this NPE also occurs if there are errors in manually
updating the config file or if I forgot to update that file after manually
deploying a new portlet.
TOMCAT ERROR PAGE OUTPUT:
description The server encountered an internal error () that prevented it from
fulfilling this request.
exception
org.apache.jasper.JasperException: Exception in JSP:
/WEB-INF/themes/pluto-default-theme.jsp:109
106: <c:forEach var="portlet" varStatus="status"
107: items="${currentPage.portletIds}" begin="1"
step="2">
108: <c:set var="portlet" value="${portlet}"
scope="request"/>
109: <jsp:include page="portlet-skin.jsp"/>
110: </c:forEach>
111: </div>
112:
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.pluto.driver.PortalDriverServlet.doGet(PortalDriverServlet.java:148)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
org.apache.jasper.JasperException: Exception in JSP:
/WEB-INF/themes/portlet-skin.jsp:26
23: <div class="portlet" id='<c:out value="${portlet}"/>'>
24: <div class="header">
25: <!-- Portlet Mode Controls -->
26: <pluto:modeAnchor portletMode="view"/>
27: <pluto:modeAnchor portletMode="edit"/>
28: <pluto:modeAnchor portletMode="help"/>
29: <!-- Window State Controls -->
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_forEach_3(pluto_002ddefault_002dtheme_jsp.java:814)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_otherwise_1(pluto_002ddefault_002dtheme_jsp.java:702)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_choose_1(pluto_002ddefault_002dtheme_jsp.java:562)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspService(pluto_002ddefault_002dtheme_jsp.java:159)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.pluto.driver.PortalDriverServlet.doGet(PortalDriverServlet.java:148)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
org.apache.pluto.driver.tags.PortletModeAnchorTag.isPortletModeAllowed(PortletModeAnchorTag.java:161)
org.apache.pluto.driver.tags.PortletModeAnchorTag.doStartTag(PortletModeAnchorTag.java:89)
org.apache.jsp.WEB_002dINF.themes.portlet_002dskin_jsp._jspx_meth_pluto_modeAnchor_0(portlet_002dskin_jsp.java:178)
org.apache.jsp.WEB_002dINF.themes.portlet_002dskin_jsp._jspx_meth_pluto_portlet_0(portlet_002dskin_jsp.java:115)
org.apache.jsp.WEB_002dINF.themes.portlet_002dskin_jsp._jspService(portlet_002dskin_jsp.java:73)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_forEach_3(pluto_002ddefault_002dtheme_jsp.java:814)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_otherwise_1(pluto_002ddefault_002dtheme_jsp.java:702)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspx_meth_c_choose_1(pluto_002ddefault_002dtheme_jsp.java:562)
org.apache.jsp.WEB_002dINF.themes.pluto_002ddefault_002dtheme_jsp._jspService(pluto_002ddefault_002dtheme_jsp.java:159)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.pluto.driver.PortalDriverServlet.doGet(PortalDriverServlet.java:148)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
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