Hi.
I have upgraded my Struts application from 1.2 to 1.3.10. With minor problems at first it finally worked. Suddenly it stopped working and I guess it must be after restart of the service. I guess it is a problem with versions of the jar file, but I am not sure. Does anybody have an idear, as I am ready to hang myself. I now get the following error message: 2010-05-26 10:41:20 org.apache.struts.chain.commands.ExceptionCatcher postprocess WARNING: Exception from exceptionCommand 'servlet-exception' java.lang.NullPointerException at nc.persistence.PersistenceFacade.closeConnection(PersistenceFacade.java:69) at nc.actions.secure.GetUserNameAction.execute(GetUserNameAction.java:66) at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction .java:58) at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecu teAction.java:67) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase .java:51) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:30 5) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequest Processor.java:283) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) at javax.servlet.http.HttpServlet.service(HttpServlet.java:627) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher. java:672) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatch er.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher .java:499) at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:9 65) at org.apache.jsp.includes.welcome_jsp._jspService(welcome_jsp.java:42) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 31) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:321) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:257) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher. java:672) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatch er.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher .java:499) at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:9 65) at org.apache.jsp.includes.header_jsp._jspService(header_jsp.java:62) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 31) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:321) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:257) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher. java:672) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatch er.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher .java:499) at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:9 65) at org.apache.jsp.secure.errorpage_jsp._jspService(errorpage_jsp.java:86) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 31) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:321) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:257) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher. java:672) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatch er.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher .java:499) at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:9 65) at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:600) at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextI mpl.java:803) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp l.java:774) at org.apache.jsp.secure.index_jsp._jspService(index_jsp.java:107) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 31) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:321) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:257) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:204) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:178) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase .java:524) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126 ) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105 ) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processC onnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.jav a:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWo rkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav a:684) at java.lang.Thread.run(Unknown Source)