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From "Howard M. Lewis Ship (JIRA)" <jetspeed-...@jakarta.apache.org>
Subject [jira] Created: (JS2-216) NPE when refreshing page after restart
Date Thu, 24 Feb 2005 16:37:52 GMT
NPE when refreshing page after restart
--------------------------------------

         Key: JS2-216
         URL: http://issues.apache.org/jira/browse/JS2-216
     Project: Jetspeed 2
        Type: Bug
  Components: Deployment  
    Versions: 2.0-M1    
 Environment: JDK 1.4, Windows XP, Tomcat 5
    Reporter: Howard M. Lewis Ship


I've had to frequently stop/restart Tomcat to pick up some changes to portlets (or rather,
auxilliary classes used by the portlets).

If, after stopping and restarting Tomcat, I refresh the portal web page (i.e., with a URL
like http://localhost:8080/jetspeed/portal/_ns:YWRwLTE5fGMwfGQx/), I get:

VelocityViewServlet : Error processing the template

java.lang.NullPointerException
	at org.apache.jetspeed.velocity.JetspeedVelocityViewServlet.getVelocityEngine(JetspeedVelocityViewServlet.java:296)
	at org.apache.jetspeed.velocity.JetspeedVelocityViewServlet.getTemplate(JetspeedVelocityViewServlet.java:208)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.handleRequest(Unknown Source)
	at org.apache.portals.bridges.velocity.BridgesVelocityViewServlet.handleRequest(BridgesVelocityViewServlet.java:85)
	at org.apache.jetspeed.velocity.JetspeedVelocityViewServlet.handleRequest(JetspeedVelocityViewServlet.java:186)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doRequest(Unknown Source)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doGet(Unknown Source)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:590)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:510)
	at org.apache.jetspeed.container.JetspeedContainerServlet.doGet(JetspeedContainerServlet.java:259)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:590)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:510)
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.invoke(ServletPortletInvoker.java:213)
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.render(ServletPortletInvoker.java:124)
	at org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:103)
	at org.apache.jetspeed.container.JetspeedPortletContainerWrapper.renderPortlet(JetspeedPortletContainerWrapper.java:88)
	at org.apache.jetspeed.aggregator.impl.PortletRendererImpl.renderNow(PortletRendererImpl.java:110)
	at org.apache.jetspeed.aggregator.impl.PageAggregatorImpl.build(PageAggregatorImpl.java:251)
	at org.apache.jetspeed.aggregator.AggregatorValve.invoke(AggregatorValve.java:48)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.pipeline.valve.impl.ActionValveImpl.invoke(ActionValveImpl.java:117)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.container.ContainerValve.invoke(ContainerValve.java:76)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.profiler.impl.ProfilerValveImpl.invoke(ProfilerValveImpl.java:133)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.security.impl.PasswordCredentialValveImpl.invoke(PasswordCredentialValveImpl.java:139)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.security.impl.AbstractSecurityValve$1.run(AbstractSecurityValve.java:108)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAsPrivileged(Subject.java:437)
	at org.apache.jetspeed.security.impl.AbstractSecurityValve.invoke(AbstractSecurityValve.java:102)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.container.url.impl.PortalURLValveImpl.invoke(PortalURLValveImpl.java:55)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.capabilities.impl.CapabilityValveImpl.invoke(CapabilityValveImpl.java:127)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.localization.impl.LocalizationValveImpl.invoke(LocalizationValveImpl.java:73)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext(JetspeedPipeline.java:209)
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invoke(JetspeedPipeline.java:191)
	at org.apache.jetspeed.engine.AbstractEngine.service(AbstractEngine.java:259)
	at org.apache.jetspeed.engine.JetspeedServlet.doGet(JetspeedServlet.java:225)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:534)


I prefer it to work, or to produce an error message about the URL being out of date, but certainly
not an exception.

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