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

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 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 ?