Help! - NPE on string page parameter in EL
terryb Nov 20, 2008 6:17 AMHaving upgraded to Seam 2.1.0.SP, I am sudddenly getting NullPointerException on String page paramters.
I use some page paramters just to pass on to next page via page navigation, like below, but now doesnt like evaluating parameter anymore:
<page ...> <param name="courseSysCourseIdList"/> <navigation from-action="#{courseSysCourseAction.editCourseAction}"> <rule if-outcome="valid"> <redirect view-id="#{'orgUserAuthenticated.isLicensee'}"> <param name="courseSysCourseId" value="#{courseSysCourseIdList}"/> </redirect> </rule> </navigation> </page>
WARN [Param] could not create converter for: courseSysCourseId java.lang.NullPointerException at org.jboss.seam.jsf.SeamApplication$ConverterLocator.locateConverter(SeamApplication.java:166) at org.jboss.seam.jsf.SeamApplication$ConverterLocator.getConverter(SeamApplication.java:148) at org.jboss.seam.jsf.SeamApplication.createConverter(SeamApplication.java:122) at org.jboss.seam.navigation.Param.getConverter(Param.java:66) at org.jboss.seam.navigation.Param.getStringValueFromModel(Param.java:143) at org.jboss.seam.navigation.RedirectNavigationHandler.navigate(RedirectNavigationHandler.java:46) at org.jboss.seam.navigation.Rule.execute(Rule.java:100) at org.jboss.seam.navigation.Navigation.navigate(Navigation.java:58) at org.jboss.seam.navigation.Pages.navigate(Pages.java:206) at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:42) at org.jboss.seam.navigation.Pages.handleOutcome(Pages.java:671) at org.jboss.seam.navigation.Pages.callAction(Pages.java:713) at org.jboss.seam.navigation.Pages.preRender(Pages.java:349) at org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:562) at org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:473) at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:146) at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:116) at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:214) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:96) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507) at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:543) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:853) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1513) at java.lang.Thread.run(Thread.java:619)