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https://issues.jboss.org/browse/SEAMSOCIAL-19?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12665000#comment-12665000
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Antoine Sabot-Durand commented on SEAMSOCIAL-19:
------------------------------------------------
I guess this error occurs after the session timeout. The {{{SocialClient}}}
bean is stored in session scope so when the session times out the bean is
discarded with its dependent bean {{{MultiServicesManagerImpl}}}.
I can provide a nice error message when this occurs (when you reload the page
you get new bean and a new current service but you lost other services if you
were connected to them).
If you want to support 1 or 2 hours of iddling, you have to set the right
timeout for the application. But in this case I suggest you make SocialClient a
Stateful EJB to support passivation.
> WebClient example NPE in MultiServicesManagerImpl.connectCurrentService on
> facebook callback
> --------------------------------------------------------------------------------------------
>
> Key: SEAMSOCIAL-19
> URL: https://issues.jboss.org/browse/SEAMSOCIAL-19
> Project: Seam Social
> Issue Type: Bug
> Components: Facebook
> Environment: jboss-as-7.0.2.Final, seam social 3.1.0-SNAPSHOT
> (2011-10-31)
> Reporter: Marek Schmidt
> Assignee: Antoine Sabot-Durand
>
> Sometimes (but not always, but happened more than once... ) after a redirect
> from Facebook login, I see the following exception instead of the webclient
> callback page:
> I could not reproduce it by aggresive clicking after it happened, so I
> suspect it may occur after some session times out somewhere...
> also, I am not sure it is facebook-specific or not.
> {noformat}
> 10:43:00,308 ERROR
> [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/social-web-client].[Faces
> Servlet]] (http-dhcp-26-127.brq.redhat.com-127.0.0.1-8080-1)
> Servlet.service() for servlet Faces Servlet threw exception:
> java.lang.NullPointerException
> at
> org.jboss.seam.social.MultiServicesManagerImpl.connectCurrentService(MultiServicesManagerImpl.java:120)
> [seam-social-3.1.0-20111031.085713-20.jar:]
> at
> org.jboss.seam.social.examples.webclient.SocialClient.connectCurrentService(SocialClient.java:93)
> [classes:]
> at
> org.jboss.seam.social.examples.webclient.SocialClient$Proxy$_$$_WeldClientProxy.connectCurrentService(SocialClient$Proxy$_$$_WeldClientProxy.java)
> [classes:]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> [:1.6.0_24]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> [:1.6.0_24]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> [:1.6.0_24]
> at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_24]
> at org.apache.el.parser.AstValue.invoke(AstValue.java:196)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43)
> [weld-core-1.1.2.Final.jar:2011-07-26 15:02]
> at
> org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56)
> [weld-core-1.1.2.Final.jar:2011-07-26 15:02]
> at
> com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> com.sun.faces.facelets.tag.jsf.core.DeclarativeSystemEventListener.processEvent(EventHandler.java:128)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> javax.faces.component.UIComponent$ComponentSystemEventListenerAdapter.processEvent(UIComponent.java:2508)
> [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
> at javax.faces.event.SystemEvent.processListener(SystemEvent.java:106)
> [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
> at
> com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2129)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> com.sun.faces.application.ApplicationImpl.invokeComponentListenersFor(ApplicationImpl.java:2077)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:286)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:244)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at
> org.jboss.as.weld.webtier.jsf.ForwardingApplication.publishEvent(ForwardingApplication.java:293)
> [jboss-as-weld-7.0.2.Final.jar:7.0.2.Final]
> at
> com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:108)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
> [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
> [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:67)
> [weld-core-1.1.2.Final.jar:2011-07-26 15:02]
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65)
> [solder-impl-3.1.0.Beta3.jar:]
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:72)
> [solder-impl-3.1.0.Beta3.jar:]
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139)
> [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
> at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57)
> [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952)
> [jbossweb-7.0.1.Final.jar:7.0.2.Final]
> at java.lang.Thread.run(Thread.java:662) [:1.6.0_24]
> {noformat}
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