[JS2-216] NPE when refreshing page after restart

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-M1
• Fix Version/s: 2.0-dev/cvs, 2.0-M2
• Component/s: Deployment
• Environment: JDK 1.4, Windows XP, Tomcat 5
• Assignee: Unassigned
• Reporter: Howard Lewis Ship
• Created: 25/Feb/05 01:33
• Updated: 04/Oct/11 21:37
• Resolved: 02/Apr/05 00:06

Description

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.