Flowable Upgrade issue from v5.23 to v6.5

Flowable Engine
1

Hi,

I am also trying to migration from flowable v5.22 to v6.5.
as mentioned I have also added following code for migration

processEngineConfiguration.setFlowable5CompatibilityEnabled(true);
processEngineConfiguration.setFlowable5CompatibilityHandlerFactory(springFlowable5CompatibilityHandlerFactory());
processEngineConfiguration.setFlowable5ExpressionManager(new org.activiti.engine.impl.el.ExpressionManager());

After doing the changes, DB upgrades successfully. Processing Engine also starts, but when actioned on any of the existing task which were created before migration getting following error

Caused by: org.activiti.engine.ActivitiException: Unknown property used in expression: ${UserAction.doUserAction(execution)}
at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:55) ~[flowable5-engine-6.5.0.jar:6.5.0]
at org.activiti.engine.impl.bpmn.behavior.ServiceTaskExpressionActivityBehavior.execute(ServiceTaskExpressionActivityBehavior.java:79) ~[flowable5-engine-6.5.0.jar:6.5.0]
… 62 common frames omitted
Caused by: org.flowable.common.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier ‘UserAction’
at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstIdentifier.eval(AstIdentifier.java:97) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstMethod.eval(AstMethod.java:84) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstMethod.eval(AstMethod.java:107) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstEval.eval(AstEval.java:53) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstNode.getValue(AstNode.java:31) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.flowable.common.engine.impl.de.odysseus.el.TreeValueExpression.getValue(TreeValueExpression.java:122) ~[flowable-engine-common-6.5.0.jar:6.5.0]
at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:34) ~[flowable5-engine-6.5.0.jar:6.5.0]
at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:35) ~[flowable5-engine-6.5.0.jar:6.5.0]
at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:26) ~[flowable5-engine-6.5.0.jar:6.5.0]
at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:52) ~[flowable5-engine-6.5.0.jar:6.5.0]
… 63 common frames omitted

UserAction is the bean which I am calling from the service task.
Once I upload the bpmn definition in v6, this starts to work again, without any change.

2

I tried to debug the issue. Not able to pin-point the issue. Here are few observations

org.flowable.common.engine.impl.de.odysseus.el.TreeValueExpression.getValue(TreeValueExpression.java:122) >> Bindings dont have values related to expression.

Because of that org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstIdentifier.eval is not able to find valueExpression. and due to that base (beanname) is passed as null to org.flowable.common.engine.impl.javax.el.getValue

Capture

3

To me its due to bindings in “org.flowable.common.engine.impl.de.odysseus.el.TreeValueExpression” doesn’t have appropriate values.
BeanElResolver can’t resolve the bean if base is passed as null and property is passed as beanName.

3
31152×648 14.2 KB

3.1
3.11152×648 13.4 KB

Any suggestion?

4

Can you clarify how you exposed that bean? In Spring? Spring Boot? Programmatically?

5

These are spring beans.

@Named(“UserAction”)
public class UserActionImpl {
…