topic Re: Hints ActivitiException: Unknown property used in expression in Alfresco Archive

Hints ActivitiException: Unknown property used in expression

jonathan1 — Thu, 18 Oct 2012 19:46:25 GMT

Does anyone have any hints on debugging bpmn files whose execution throwsActivitiException: Unknown property used in expression at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:55)….? It'd be super useful to know what the unknown property is. Can I submit a Jira/reques

Re: Hints ActivitiException: Unknown property used in expression

jbarrez — Fri, 19 Oct 2012 05:57:30 GMT

I'm afraid Activiti just wraps the exception thrown by JUEL, so I don't think there is much we can do to enhance it.

Would it help if the exception states more explicitely in which step the error happened?

Re: Hints ActivitiException: Unknown property used in expression

frederikherema1 — Fri, 19 Oct 2012 12:28:00 GMT

The Cause-exception of the ActivitiException states what property actually is involved…

Eg:

at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:80)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:546)
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'outputTransition'

Re: Hints ActivitiException: Unknown property used in expression

jonathan1 — Fri, 19 Oct 2012 14:33:07 GMT

Thanks, frederikheremans. I lost the property name in the kilometer-long stack trace.

My initial suggestion was to update the passing of the PropertyNotFoundException in JuelExpression.java, Activiti 5.10, line 55 from

throw new ActivitiException("Unknown property used in expression", pnfe);

throw new ActivitiException("Unknown property used in expression: " + pnfe.getMessage(), pnfe);

It's a pretty minor change, I should have had the patience to look deeper into the stack trace.