I am getting java.lang.LinkageError: loader constraint violation:

I have developed a sample portlet(liferay) application using JSF.

The attachment has the folder structures and the jars i have included. I have put jsf-api and jsf-impl
from the jbossweb.sar of jboss 5.1.0, in the build path of the project.

I am getting the following exception on accessing the portlet. Please help me solve this issue

2010-09-10 17:06:17,959 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/Dell].[RegisterClaim]] (http-127.0.0.1-8080-2) Servlet.service() for servlet RegisterClaim threw exception
java.lang.LinkageError: loader constraint violation: when resolving overridden method "com.sun.faces.portlet.FacesContextImpl.getELContext()Ljavax/el/ELContext;" the class loader (instance of org/jboss/classloader/spi/base/BaseClassLoader) of the current class, com/sun/faces/portlet/FacesContextImpl, and its superclass loader (instance of org/jboss/classloader/spi/base/BaseClassLoader), have different Class objects for the type javax/el/ELContext used in the signature
    at com.sun.faces.portlet.FacesContextFactoryImpl.getFacesContext(FacesContextFactoryImpl.java:81)
    at com.sun.faces.portlet.FacesPortlet.renderFaces(FacesPortlet.java:346)
    at com.sun.faces.portlet.FacesPortlet.doView(FacesPortlet.java:286)
    at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328)
    at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
    at com.sun.portal.portletcontainer.appengine.filter.FilterChainImpl.doFilter(FilterChainImpl.java:126)
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:69)
    at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:100)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:543)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:480)
    at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:616)
    at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:698)
    at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:417)
    at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1414)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:543)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:480)
    at com.liferay.portal.util.PortalImpl.renderPortlet(PortalImpl.java:2801)
    at com.liferay.portal.util.PortalUtil.renderPortlet(PortalUtil.java:858)
    at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processPortlet(RuntimePortletUtil.java:170)
    at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processPortlet(RuntimePortletUtil.java:103)
    at com.liferay.portlet.layoutconfiguration.util.velocity.PortletColumnLogic.processContent(PortletColumnLogic.java:133)
    at com.liferay.portlet.layoutconfiguration.util.velocity.TemplateProcessor.processColumn(TemplateProcessor.java:68)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:389)
    at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:378)
    at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270)
    at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:252)
    at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:332)
    at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
    at org.apache.velocity.Template.merge(Template.java:328)
    at org.apache.velocity.Template.merge(Template.java:235)
    at org.apache.velocity.app.VelocityEngine.mergeTemplate(VelocityEngine.java:381)
    at com.liferay.portal.velocity.VelocityEngineImpl.mergeTemplate(VelocityEngineImpl.java:179)
    at com.liferay.portal.kernel.velocity.VelocityEngineUtil.mergeTemplate(VelocityEngineUtil.java:84)
    at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processTemplate(RuntimePortletUtil.java:237)
    at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processTemplate(RuntimePortletUtil.java:190)
    at org.apache.jsp.html.portal.layout.view.portlet_jsp._jspService(portlet_jsp.java:824)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:543)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:480)
    at com.liferay.portal.action.LayoutAction.includeLayoutContent(LayoutAction.java:294)
    at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:466)
    at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:195)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
    at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:159)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:505)
    at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:732)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:444)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:310)
    at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:143)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:142)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:140)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:282)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.cache.CacheFilter.processFilter(CacheFilter.java:417)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:244)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.sso.opensso.OpenSSOFilter.processFilter(OpenSSOFilter.java:73)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:193)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.doFilter(VirtualHostFilter.java:188)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
    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:235)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
    at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
    at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)
2010-09-10 17:06:17,975 INFO  [STDOUT] (http-127.0.0.1-8080-2) 17:06:17,975 ERROR [jsp:165] java.lang.LinkageError: loader constraint violation: when resolving overridden method "com.sun.faces.portlet.FacesContextImpl.getELContext()Ljavax/el/ELContext;" the class loader (instance of org/jboss/classloader/spi/base/BaseClassLoader) of the current class, com/sun/faces/portlet/FacesContextImpl, and its superclass loader (instance of org/jboss/classloader/spi/base/BaseClassLoader), have different Class objects for the type javax/el/ELContext used in the signature
    at com.sun.faces.portlet.FacesContextFactoryImpl.getFacesContext(FacesContextFactoryImpl.java:81)
    at com.sun.faces.portlet.FacesPortlet.renderFaces(FacesPortlet.java:346)
    at com.sun.faces.portlet.FacesPortlet.doView(FacesPortlet.java:286)
    at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328)
    at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
    at com.sun.portal.portletcontainer.appengine.filter.FilterChainImpl.doFilter(FilterChainImpl.java:126)
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:69)
    at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:100)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:543)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:480)
    at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:616)
    at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:698)
    at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:417)
    at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1414)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

If Liferay is running in a JBoss container, you should not copy the JSF-impl.jar into the WAR. JBoss itself manages that.

Your actual problem sounds like a different situation, however. If you have an el-impl.jar file in your WAR, remove that. Neither JBoss nor Tomcat6 needs that, and it will interfere with the Tomcat internal copy of el-impl.jar