1 Reply Latest reply on Nov 2, 2008 9:43 PM by Ilya

    issue with concurrent calls on stateful bean

    Thiagu Mariappan Novice

      Hi every one


      I am using static HashMap in my stateful session bean with application scope for caching purpose.
      I am populating the data to HashMap when that seam component created.
      Seam component have getter and setter method for HashMap.
      Getter for retrieve the data from HashMap .
      Setter for update the data to the  HashMap.


      Here I have issue with concurrent access to the setter and getter method of seam component.


      At the time update the data from HashMap for a particular key some other thread try to read the data from HashMap for the same key means it gives the following Exception.


      Exception during request processing: 
      Caused by javax.el.ELException with message: "javax.ejb.EJBTransactionRolledbackException: no concurrent calls on stateful bean 'jboss.j2ee:service=EJB3,name=IndexerAction' (EJB3 4.3.13)" 
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
      org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
      org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
      org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
      org.jboss.seam.core.Expressions$2.invoke(Expressions.java:174)
      org.jboss.seam.navigation.Pages.callAction(Pages.java:711)
      org.jboss.seam.navigation.Pages.preRender(Pages.java:349)
      org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:562)
      org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:473)
      org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:146)
      org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:116)
      com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
      com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
      javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
      org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
      org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
      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:177)
      org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
      org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
      org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
      org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
      org.jboss.seam.servlet.SeamFilter$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:179)
      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.http11.Http11Processor.process(Http11Processor.java:844)
      org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
      org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
      java.lang.Thread.run(Thread.java:595)Caused by javax.ejb.EJBTransactionRolledbackException with message: "no concurrent calls on stateful bean 'jboss.j2ee:service=EJB3,name=IndexerAction' (EJB3 4.3.13)" 
      org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87)
      org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
      org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
      org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:206)
      org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:119)
      $Proxy151.selectFromRequest(Unknown Source)
      sun.reflect.GeneratedMethodAccessor909.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
      org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
      org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
      org.jboss.seam.ejb.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:43)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.core.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:32)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
      org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
      org.javassist.tmp.java.lang.Object_$$_javassist_6.selectFromRequest(Object_$$_javassist_6.java)
      sun.reflect.GeneratedMethodAccessor908.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
      org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
      org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
      org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
      org.jboss.seam.core.Expressions$2.invoke(Expressions.java:174)
      org.jboss.seam.navigation.Pages.callAction(Pages.java:711)
      org.jboss.seam.navigation.Pages.preRender(Pages.java:349)
      org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:562)
      org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:473)
      org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:146)
      org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:116)
      com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
      com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
      javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
      org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
      org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
      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:177)
      org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
      org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
      org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
      org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
      org.jboss.seam.servlet.SeamFilter$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:179)
      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.http11.Http11Processor.process(Http11Processor.java:844)
      org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
      org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
      java.lang.Thread.run(Thread.java:595)Caused by javax.ejb.ConcurrentAccessException with message: "no concurrent calls on stateful bean 'jboss.j2ee:service=EJB3,name=IndexerAction' (EJB3 4.3.13)" 
      org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:73)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
      org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:206)
      org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:119)
      $Proxy149.getCacheMap(Unknown Source)
      sun.reflect.GeneratedMethodAccessor913.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
      org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
      org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
      org.jboss.seam.ejb.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:43)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
      org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
      org.javassist.tmp.java.lang.Object_$$_javassist_0.getCacheMap(Object_$$_javassist_0.java)
      session.beans.ProductsAction.selectFromRequest(ProductsAction.java:339)
      sun.reflect.GeneratedMethodAccessor910.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
      org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
      org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:44)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
      org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.core.ConversationInterceptor.aroundInvoke(ConversationInterceptor.java:56)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:29)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:31)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
      org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:50)
      sun.reflect.GeneratedMethodAccessor166.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
      org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:71)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
      org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
      org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
      org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:206)
      org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:119)
      $Proxy151.selectFromRequest(Unknown Source)
      sun.reflect.GeneratedMethodAccessor909.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
      org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
      org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
      org.jboss.seam.ejb.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:43)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.core.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:32)
      org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
      org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
      org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
      org.javassist.tmp.java.lang.Object_$$_javassist_6.selectFromRequest(Object_$$_javassist_6.java)
      sun.reflect.GeneratedMethodAccessor908.invoke(Unknown Source)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      java.lang.reflect.Method.invoke(Method.java:585)
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
      org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
      org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
      org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
      org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
      org.jboss.seam.core.Expressions$2.invoke(Expressions.java:174)
      org.jboss.seam.navigation.Pages.callAction(Pages.java:711)
      org.jboss.seam.navigation.Pages.preRender(Pages.java:349)
      org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:562)
      org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:473)
      org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:146)
      org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:116)
      com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
      com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
      javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
      org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
      org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
      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:177)
      org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
      org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
      org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
      org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
      org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
      org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
      org.jboss.seam.servlet.SeamFilter$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:179)
      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.http11.Http11Processor.process(Http11Processor.java:844)
      org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
      org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
      java.lang.Thread.run(Thread.java:595)
      


      I try with @Synchronized annotation fro the seam component still I got the same exception.
      Please any one help me to resolve this exception.


      By
      Thiagu.m