So when a request is done to the REST API, which then fails, we only get the topmost exception message. This is handled by the following code:
Especially when testing DMN expressions, it can be very helpful to know the underlying error.
For example, when an expression evaluation fails with the following error:
Caused by: org.camunda.bpm.engine.ProcessEngineException: Exception while evaluating decision with key 'null' (...) Caused by: org.camunda.bpm.dmn.engine.impl.DmnEvaluationException: DMN-01002 Unable to evaluate expression for language 'feel': 'klant' (...) Caused by: javax.script.ScriptException: failed to evaluate expression 'klant': no variable found for name 'klant' (...)
Only the first message is relayed to the client:
Caused by: org.camunda.bpm.engine.ProcessEngineException: Exception while evaluating decision with key 'null'
Now, I’m looking for some advice as to how to fix this.
Should this be presented as a PR to the engine?
I can imagine there are good reasons for this, so I don’t know if it’s something to “fix” persé.
Could this be done using a plugin?
If so, I’d like a little guidance on where to start. I don’t mind to solve this using a plugin, but I don’t know yet if that’s the way to go or if it’s even possible.
Thanks in advance!