Random\nondeterministic "Could not instantiate Seam component" messages
I have random errors with:
Could not instantiate Seam component
Traced to the setEJBQL() of an EntityQuery method. The error disappears on a subsequent click, but I can't seem to find why this is happening. I am using seam 2.1.1 and JBoss Developer Studio 2.0.0.GA with Jboss 4.2.3. Does anyone have an idea how to remedy these random errors? I don't seem to have a repeatable pattern either. They also occur randomly in a production environment when my App is deployed as a WAR. Here is the full stack trace:
Caused by org.jboss.seam.InstantiationException with message: "Could not instantiate Seam component: externalListingList" org.jboss.seam.Component.newInstance(Component.java:2144) org.jboss.seam.Component.getInstance(Component.java:2021) org.jboss.seam.Component.getInstance(Component.java:1983) org.jboss.seam.Component.getInstance(Component.java:1977) org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55) org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50) org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:147) org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:51) javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53) com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72) org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44) org.jboss.el.parser.AstValue.getValue(AstValue.java:63) org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) org.jboss.seam.core.Expressions$1.getValue(Expressions.java:112) org.jboss.seam.navigation.Param.getStringValueFromModel(Param.java:139) org.jboss.seam.navigation.Pages.getStringValuesFromModel(Pages.java:748) org.jboss.seam.ui.component.UISeamCommandBase.getUrl(UISeamCommandBase.java:62) org.jboss.seam.ui.renderkit.ButtonRendererBase.getOnClick(ButtonRendererBase.java:37) org.jboss.seam.ui.renderkit.ButtonRendererBase.doEncodeBegin(ButtonRendererBase.java:66) org.jboss.seam.ui.util.cdk.RendererBase.encodeBegin(RendererBase.java:79) javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:813) org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:280) org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262) org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:284) org.richfaces.renderkit.AbstractRowsRenderer.encodeCellChildren(AbstractRowsRenderer.java:285) org.richfaces.renderkit.AbstractTableRenderer.encodeOneRow(AbstractTableRenderer.java:371) org.richfaces.renderkit.AbstractRowsRenderer.process(AbstractRowsRenderer.java:86) org.ajax4jsf.model.SequenceDataModel.walk(SequenceDataModel.java:101) org.ajax4jsf.component.UIDataAdaptor.walk(UIDataAdaptor.java:1151) org.richfaces.renderkit.AbstractRowsRenderer.encodeRows(AbstractRowsRenderer.java:106) org.richfaces.renderkit.AbstractRowsRenderer.encodeRows(AbstractRowsRenderer.java:91) org.richfaces.renderkit.AbstractTableRenderer.encodeTBody(AbstractTableRenderer.java:76) org.richfaces.renderkit.AbstractTableRenderer.encodeChildren(AbstractTableRenderer.java:83) javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837) org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282) org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262) org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:220) org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:215) org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121) javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837) javax.faces.component.UIComponent.encodeAll(UIComponent.java:936) javax.faces.component.UIComponent.encodeAll(UIComponent.java:942) com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592) org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100) org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:109) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) javax.faces.webapp.FacesServlet.service(FacesServlet.java:266) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178) org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390) org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517) org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437) org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) java.lang.Thread.run(Thread.java:595)
