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Start ProcessInstance Unknown property used in expression: #{employee}

Question asked by tunglk on Nov 13, 2015
Latest reply on Nov 16, 2015 by martin.grofcik
Hi all,

I try to start a ProcessInstance but have err

My code:
       try{
           identityService.setAuthenticatedUserId("kermit");
           runtimeService.startProcessInstanceById(processID);
       }catch(Exception e){
          e.printStackTrace();
       }

Output Err:
16:30:25.790 [http-bio-8080-exec-6] DEBUG o.a.e.i.interceptor.CommandContext - Error while closing command context
org.activiti.engine.ActivitiException: Unknown property used in expression: #{employee}
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:53) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.handleAssignments(UserTaskActivityBehavior.java:190) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.execute(UserTaskActivityBehavior.java:144) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:80) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:35) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:452) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:430) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:140) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:45) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:64) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:380) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:110) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47) [activiti-spring-5.18.0.jar:5.18.0]
   at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) [spring-tx-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45) [activiti-spring-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:37) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:101) [activiti-engine-5.18.0.jar:5.18.0]
   at com.tinhvan.controller.HomeController.startProcess(HomeController.java:106) [classes/:na]
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
   at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
   at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) [spring-web-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) [spring-web-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) [servlet-api.jar:na]
   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) [servlet-api.jar:na]
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.65]
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat7-websocket.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.65]
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [catalina.jar:7.0.65]
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.65]
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.65]
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) [catalina.jar:7.0.65]
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) [tomcat-coyote.jar:7.0.65]
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625) [tomcat-coyote.jar:7.0.65]
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) [tomcat-coyote.jar:7.0.65]
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_79]
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_79]
   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.65]
   at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'employee'
   at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:48) ~[activiti-engine-5.18.0.jar:5.18.0]
   … 106 common frames omitted
16:30:25.800 [http-bio-8080-exec-6] DEBUG o.s.j.d.DataSourceTransactionManager - Participating in existing transaction
16:30:25.800 [http-bio-8080-exec-6] DEBUG o.a.i.t.managed.ManagedTransaction - Closing JDBC Connection [Transaction-aware proxy for target Connection [conn23: url=jdbc:h2:tcp://localhost/~/activiti user=SA]]
16:30:25.810 [http-bio-8080-exec-6] DEBUG o.s.t.support.TransactionTemplate - Initiating transaction rollback on application exception
org.activiti.engine.ActivitiException: Unknown property used in expression: #{employee}
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:53) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.handleAssignments(UserTaskActivityBehavior.java:190) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.execute(UserTaskActivityBehavior.java:144) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:80) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:35) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:452) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:430) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:140) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:45) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:64) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:380) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:110) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47) ~[activiti-spring-5.18.0.jar:5.18.0]
   at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45) [activiti-spring-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:37) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) [activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:101) [activiti-engine-5.18.0.jar:5.18.0]
   at com.tinhvan.controller.HomeController.startProcess(HomeController.java:106) [classes/:na]
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
   at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
   at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) [spring-web-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) [spring-web-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) [servlet-api.jar:na]
   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) [servlet-api.jar:na]
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.65]
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat7-websocket.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.65]
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.65]
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [catalina.jar:7.0.65]
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.65]
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) [catalina.jar:7.0.65]
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.65]
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) [catalina.jar:7.0.65]
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) [tomcat-coyote.jar:7.0.65]
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625) [tomcat-coyote.jar:7.0.65]
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) [tomcat-coyote.jar:7.0.65]
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_79]
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_79]
   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.65]
   at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'employee'
   at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25) ~[activiti-engine-5.18.0.jar:5.18.0]
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:48) ~[activiti-engine-5.18.0.jar:5.18.0]
   … 106 common frames omitted
16:30:25.810 [http-bio-8080-exec-6] DEBUG o.s.j.d.DataSourceTransactionManager - Initiating transaction rollback
16:30:25.810 [http-bio-8080-exec-6] DEBUG o.s.j.d.DataSourceTransactionManager - Rolling back JDBC transaction on Connection [conn23: url=jdbc:h2:tcp://localhost/~/activiti user=SA]
16:30:25.820 [http-bio-8080-exec-6] DEBUG o.s.j.d.DataSourceTransactionManager - Releasing JDBC Connection [conn23: url=jdbc:h2:tcp://localhost/~/activiti user=SA] after transaction
16:30:25.820 [http-bio-8080-exec-6] DEBUG o.s.jdbc.datasource.DataSourceUtils - Returning JDBC Connection to DataSource
16:30:25.820 [http-bio-8080-exec-6] DEBUG o.a.e.i.interceptor.LogInterceptor - — StartProcessInstanceCmd finished ——————————————————–
16:30:25.820 [http-bio-8080-exec-6] DEBUG o.a.e.i.interceptor.LogInterceptor -

org.activiti.engine.ActivitiException: Unknown property used in expression: #{employee}
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:53)
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.handleAssignments(UserTaskActivityBehavior.java:190)
   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.execute(UserTaskActivityBehavior.java:144)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:80)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:35)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:452)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:430)
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:140)
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66)
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:45)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:64)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:96)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:633)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:628)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:380)
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:110)
   at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37)
   at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
   at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
   at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
   at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
   at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
   at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:37)
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
   at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:101)
   at com.tinhvan.controller.HomeController.startProcess(HomeController.java:106)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:606)
   at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
   at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
   at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
   at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
   at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
   at java.lang.Thread.run(Thread.java:745)
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'employee'
   at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
   at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50)
   at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26)
   at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
   at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33)
   at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)
   at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:48)
   … 106 more
16:30:32.381 [http-bio-8080-exec-6] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name 'Successful'
16:30:32.381 [http-bio-8080-exec-6] DEBUG o.s.web.servlet.DispatcherServlet - Rendering view [org.springframework.web.servlet.view.JstlView: name 'Successful'; URL [/WEB-INF/views/Successful.jsp]] in DispatcherServlet with name 'appServlet'
16:30:32.381 [http-bio-8080-exec-6] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/views/Successful.jsp] in InternalResourceView 'Successful'
16:30:32.381 [http-bio-8080-exec-6] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request




What do i can resolve this.
Thanks all.

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