[richfaces-issues] [JBoss JIRA] Closed: (RF-5248) NullPointerException in HeaderResourcesRendererBase

[Tsikhon Kuprevich (JIRA)]

     [ https://jira.jboss.org/jira/browse/RF-5248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsikhon Kuprevich closed RF-5248.
---------------------------------



> NullPointerException in HeaderResourcesRendererBase
> ---------------------------------------------------
>
>                 Key: RF-5248
>                 URL: https://jira.jboss.org/jira/browse/RF-5248
>             Project: RichFaces
>          Issue Type: Bug
>    Affects Versions: 3.1.5
>         Environment: richfaces 3.1.5
> myFaces 1.1.5
> tomahawk 1.1.7
> tomcat 5.5.25
> jdk 1.6.0_10
>            Reporter: Michael Heinen
>            Assignee: Tsikhon Kuprevich
>             Fix For: 3.3.0
>
>
> I am facing sometimes a NullPointerException in class HeaderResourcesRendererBase in method getUrisSet.
> This occurs if two users post a from nearly parallel (no ajax request)
> I can sometimes reproduce it if I open two IE instances and submit two forms very fast from each IE, one after another.
> Note that the processing of the action takes some time (nearly 20 seconds due to some initializations).
> StackTrace:
> java.lang.NullPointerException
> 	at org.ajax4jsf.renderkit.HeaderResourcesRendererBase.getUrisSet(HeaderResourcesRendererBase.java:101)
> 	at org.ajax4jsf.renderkit.HeaderResourcesRendererBase.getHeaderScripts(HeaderResourcesRendererBase.java:54)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:61)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.processHeadResources(ViewResources.java:94)
> 	at org.ajax4jsf.context.ViewResources.collect(ViewResources.java:41)
> 	at org.ajax4jsf.context.AjaxContextImpl.processHeadResources(AjaxContextImpl.java:398)
> 	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:245)
> 	at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
> 	at org.apache.myfaces.custom.ppr.PPRLifecycleWrapper.render(PPRLifecycleWrapper.java:84)
> 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
> 	at com.recommind.litigation.client.web.servlets.FacesServletWrapper.service(FacesServletWrapper.java:136)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
> 	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:344)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at com.recommind.litigation.client.web.filters.LoginFilter.doFilter(LoginFilter.java:237)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at com.recommind.litigation.client.web.filters.EncodingFilter.doFilter(EncodingFilter.java:49)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at com.recommind.litigation.client.web.filters.TimerFilter.doFilter(TimerFilter.java:65)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
> 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
> 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
> 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
> 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
> 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
> 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
> 	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
> 	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
> 	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
> 	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
> 	at java.lang.Thread.run(Unknown Source)
> 	
> I added a Java Exception Breakpoint to suspend if a NullPointerException occurs.
> The vars are initialized with following values (stopped at line 101):
> for (int i = 0; i < resources.length; i++) {
> 	InternetResource resource = resources[i];
> 	uris.add(resource.getUri(context, component));   /***** line 101 *****/
> }
> component=AjaxPoll
> resources = InternetResource[1]  
> resources[1] = AjaScript 
> i=0
> resource= null !!!
> resources[i] contains a AjaScript instance but resource is null!
> So there must be an issue with multithreading, or?
> Is this a duplicate of RF-1555 ? If so is there any way to fix this in the 3.1.X branch ?

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