Updating BPMN file does not update the database

Camunda 7 Topics Discussion & Questions
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1

Am a new user to Camunda. I created a working BPMN model which has an XOR gateway with an expression #{test == "true"}
I tried changing this to #{Test =="true"} and restarted my (Local Spring Boot) Server. Was expecting the model to automatically update the expression. But I still see the old lower case #{test == "true"}.

Could someone help me understand how can I deploy the model if server restart doesn’t pick it up automatically?

2

Can you upload the model and explain how you’re starting the process?

3

Actually using the same model as yours Nial :slight_smile:! I just replaced the expression value with pseudo since I was trying to understand the concept (instead of specifying the values on the XOR GW you are using)

I have a springboot server i setup using this
https://docs.camunda.org/get-started/spring-boot/project-setup/

Also I use RDS Aurora as a backend

4

Hi @SemperFi1970

Glad you’re getting some good use out of my video :slight_smile:

I’m wondering where you’re seeing this exactly?

The new process should be deployed automatically upon restart and a new version deployed - so is it possible that you’re looking at the old version? which i image would still be deployed.

5

Ok so here is what i was doing.

  • I deployed your original mode with one change. There’s one more XOR GW after “Watch game with Niall” User task that checks with an expression ${UserStatus == "Ready"} and ${UserStatus == “NotReady”} (Accidentally used $ instead of #)
  • Started the server. Came up fine. Started the task and its waiting on “Watch game with Niall”
  • Updated the XOR expression to #{userstatus == "Ready"} and #{userstatus == “Ready”} (Made it Lower Case and fixed the $ to #)
  • Fired the complete case for “Assign case to Nial”
    I get this error. Feels like after updating the model and restarting the server - the model didn’t get updated in Camunda schemas:-
{
    "type": "RestException",
    "message": "Cannot complete task cb5060bf-f68f-11ea-bd92-fac848a92228: Unknown property used in expression: ${UserStatus == \"Ready\"}. Cause: Cannot resolve identifier 'UserStatus'"
}
6

Alrighty, can you upload the model and also the log from when you start up the engine?

7

I deleted the model :frowning: started working on your advanced tutorial. I do have the logs though

Caused by: org.camunda.bpm.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier ‘UserStatus’
at org.camunda.bpm.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
at org.camunda.bpm.engine.impl.juel.AstBinary$SimpleOperator.eval(AstBinary.java:27)
at org.camunda.bpm.engine.impl.juel.AstBinary.eval(AstBinary.java:106)
at org.camunda.bpm.engine.impl.juel.AstEval.eval(AstEval.java:50)
at org.camunda.bpm.engine.impl.juel.AstNode.getValue(AstNode.java:26)
at org.camunda.bpm.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
at org.camunda.bpm.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:40)
at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:58)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocationInContext(DefaultDelegateInterceptor.java:92)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:63)
at org.camunda.bpm.engine.impl.el.JuelExpression.getValue(JuelExpression.java:60)

8

NVM - stupid mistake on my part. My MVN build was pushing the bpmn file elsewhere. So the server restart wasn’t finding any new version to deploy,. Once I fixed the POM and it dropped in the server’s target/classes CLASSPATH - it deployed properly! @Niall

PS : I did want to check - if there’s a way to HOTDEPLOY other than using a REST API if I dont want an explicit Server Restart to update the model?
https://docs.camunda.org/manual/7.13/reference/rest/deployment/post-deployment/

9