L3 - Default Environment (Required on creation):
Tested with process and form packaged in a process application. Edit: The issue is related to start forms.
Description (Required on creation; please attach any relevant screenshots, stacktraces, log files, etc. to the ticket):
Steps to reproduce (Required on creation):
- Build the Java process application from the get started guide with 7.18.0-alpha6 version: https://github.com/camunda/camunda-get-started-java
- Deploy on Tomcat
- Start the Loan Approval process
Observed Behavior (Required on creation):
The start form cannot be loaded and it's displayed:
Form failure: can't convert null to object
Expected behavior (Required on creation):
The form is displayed as described in https://docs.camunda.org/get-started/java-process-app/forms/#re-build-and-deploy
Root Cause (Required on prioritization):
The root cause is that the variables variable is not initialized in case of start event forms and it causes a frontend exception in https://github.com/camunda/camunda-bpm-platform/blob/master/webapps/ui/tasklist/client/scripts/form/directives/cam-tasklist-form-camunda.js#L101
In case of start event forms there is no taskId so the loadVariables call is skipped and variables remains uninitialized.
Solution Ideas (Optional):
Either initialize variables to empty array or add null checks everywhere where it's used.
