Exclusive Gateway and 'Error while evaluating expression' errors

vve76 — Mon, 02 Mar 2015 10:50:01 GMT

Hi!I use Activiti 5.16.4. and try to execute simple BP. There are two errors presents:1. If I chose on User task1 form at "accept1" field "Accept" chose, I follow to the UserTask2 and it correct. If I choose reject - I follow to the ScriptTask and this correct too. But if I chose Reject, I follow

Re: Exclusive Gateway and 'Error while evaluating expression' errors

jbarrez — Tue, 03 Mar 2015 17:29:30 GMT

1. I believe you are missing quotes in your flow conditions. Now they are booleans and not strings.

2. That should work. Dont you have more stacktrace (in the server console) ?

Re: Exclusive Gateway and 'Error while evaluating expression' errors

vve76 — Wed, 04 Mar 2015 05:08:58 GMT

Hi!
Big thanks for you answer. Question 1 have solved successfully. About question 2 I have error message:
<code>
╨╝╨░╤А 04, 2015 10:59:17 AM com.vaadin.Application terminalError
SEVERE: Terminal error:
com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClic
k in org.activiti.explorer.ui.form.FormPropertiesForm$1 failed.
        at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)

        at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
        at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219
)
        at com.vaadin.ui.Button.fireClick(Button.java:567)
        at com.vaadin.ui.Button.changeVariables(Button.java:223)
        at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVar
iables(AbstractCommunicationManager.java:1460)
        at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVar
iableBurst(AbstractCommunicationManager.java:1404)
        at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVar
iables(AbstractCommunicationManager.java:1329)
        at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleU
idlRequest(AbstractCommunicationManager.java:761)
        at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest
(CommunicationManager.java:325)
        at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(Abs
tractApplicationServlet.java:501)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:208)
        at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.j
ava:44)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:503)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:103)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:421)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp
11Processor.java:1070)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(
AbstractProtocol.java:611)
        at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpo
int.java:2466)
        at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoin
t.java:2455)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskTh
read.java:61)
        at java.lang.Thread.run(Thread.java:744)
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method
componentEvent in org.activiti.explorer.ui.task.TaskDetailPanel$4 failed.
        at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)

        at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
        at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219
)
        at org.activiti.explorer.ui.form.FormPropertiesForm.access$000(FormPrope
rtiesForm.java:45)
        at org.activiti.explorer.ui.form.FormPropertiesForm$1.buttonClick(FormPr
opertiesForm.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)

        … 35 more
Caused by: org.activiti.engine.ActivitiException: Error while evaluating express
ion: ${par1}
        at org.activiti.engine.impl.el.JuelExpression.setValue(JuelExpression.ja
va:71)
        at org.activiti.engine.impl.form.FormPropertyHandler.submitFormProperty(
FormPropertyHandler.java:108)
        at org.activiti.engine.impl.form.DefaultFormHandler.submitFormProperties
(DefaultFormHandler.java:97)
        at org.activiti.engine.impl.cmd.SubmitTaskFormCmd.execute(SubmitTaskForm
Cmd.java:47)
        at org.activiti.engine.impl.cmd.NeedsActiveTaskCmd.execute(NeedsActiveTa
skCmd.java:59)
        at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandIn
voker.java:24)
        at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execut
e(CommandContextInterceptor.java:57)
        at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(Sp
ringTransactionInterceptor.java:47)
        at org.springframework.transaction.support.TransactionTemplate.execute(T
ransactionTemplate.java:133)
        at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransa
ctionInterceptor.java:45)
        at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterc
eptor.java:31)
        at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecu
torImpl.java:40)
        at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecu
torImpl.java:35)
        at org.activiti.engine.impl.FormServiceImpl.submitTaskFormData(FormServi
ceImpl.java:70)
        at org.activiti.explorer.ui.task.TaskDetailPanel$4.handleFormSubmit(Task
DetailPanel.java:315)
        at org.activiti.explorer.ui.form.FormPropertiesEventListener.componentEv
ent(FormPropertiesEventListener.java:39)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)

        … 44 more
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot r
esolve identifier 'par1'
        at org.activiti.engine.impl.juel.AstIdentifier.setValue(AstIdentifier.ja
va:97)
        at org.activiti.engine.impl.juel.AstEval.setValue(AstEval.java:86)
        at org.activiti.engine.impl.juel.TreeValueExpression.setValue(TreeValueE
xpression.java:138)
        at org.activiti.engine.impl.delegate.ExpressionSetInvocation.invoke(Expr
essionSetInvocation.java:37)
        at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(Delegate
Invocation.java:37)
        at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleIn
vocation(DefaultDelegateInterceptor.java:25)
        at org.activiti.engine.impl.el.JuelExpression.setValue(JuelExpression.ja
va:67)
        … 64 more

</code>

Re: Exclusive Gateway and 'Error while evaluating expression' errors

trademak — Wed, 04 Mar 2015 15:16:02 GMT

The error message says that there's no process variable par1 available. Can you verify this?

Best regards,

Re: Exclusive Gateway and 'Error while evaluating expression' errors

shekhar_shaw — Thu, 23 Jul 2015 06:41:11 GMT

Hi..

I've mocked one BPMN model such that an email will be sent once user submits a form(user task using default Activiti form). I am getting the same buttonclick error.

I've explicitly stopped the SMTP server & trying to implement some error handling notification.

Can we catch the error at runtime using some boundary event or from Tasklistener ??

Thank you.

Re: Exclusive Gateway and 'Error while evaluating expression' errors

jbarrez — Thu, 23 Jul 2015 09:48:02 GMT

No, not with the current release. The 5.18 will have a mechanism to have async jobs map to bpmn errors.
For now, you can add your own ActivityBehaviour that extends from the MailActivityBehaviour, and catch the exception.

Re: Exclusive Gateway and 'Error while evaluating expression' errors

shekhar_shaw — Fri, 24 Jul 2015 06:13:02 GMT

Thank You !!!

Re: Exclusive Gateway and 'Error while evaluating expression' errors

smritishikha — Mon, 27 Jul 2015 11:17:40 GMT

i want to compare my variable value is less than or greater than some amount. what should i use script task or exclusive gateway..??
please help me in this I stuck up…

Re: Exclusive Gateway and 'Error while evaluating expression' errors

smritishikha — Mon, 27 Jul 2015 11:21:41 GMT

while using script task i put this in script task configuration

if(number<5){
var condition="true";}

else{
var condition="false";
}

and then using exclusive gateway to check whether the value of condition is true or false, but it shows that there is an unknown property used in the expression ${condition=="true"}
can you please help me in this

Re: Exclusive Gateway and 'Error while evaluating expression' errors

jbarrez — Tue, 28 Jul 2015 12:58:54 GMT

did you store the variable? ie. using execution.setVariable("condition", condition)

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Exclusive Gateway and 'Error while evaluating expression' errors

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Re: Exclusive Gateway and 'Error while evaluating expression' errors

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Re: Exclusive Gateway and 'Error while evaluating expression' errors