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  1. Red Hat Process Automation Manager
  2. RHPAM-1566

Cannot open a task form from the Task Inbox in Business Central

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      1. import the attached git repository to business central workbench.
      2. build and deploy it.
      3. run the attached curltest.sh (make sure the data.json file is at the same location).
      4. go to business central -> Task Inbox. you should see a user task with name "User Task" there. Click on it and you should see an error "Unable to find a form for task xx. Try Again later or check with your administrator."

      If you change the value in the data.json,
      from
      "accounts":null
      to
      "accounts":[]
      and run the curltest.sh again you should be able to see another "User Task" under Task Inbox. If you click on that task you should be able to open the task form and perform claim/start/complete

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      1. import the attached git repository to business central workbench. 2. build and deploy it. 3. run the attached curltest.sh (make sure the data.json file is at the same location). 4. go to business central -> Task Inbox. you should see a user task with name "User Task" there. Click on it and you should see an error "Unable to find a form for task xx. Try Again later or check with your administrator." If you change the value in the data.json, from "accounts":null to "accounts":[] and run the curltest.sh again you should be able to see another "User Task" under Task Inbox. If you click on that task you should be able to open the task form and perform claim/start/complete
    • 2018 Week 39-41, 2018 Week 42-44

      The issue occurs when a task form contains data objects that reference a list of other data objects and when the list is a null value.
      In the attached example, the relationship of the data objects is:
      DataObject ->Person
      Person ->Customer
      Customer -> List<Account>

      When the List<Account> is null, the task created via rest api will be showing under Task Inbox. However, when you click on that task it shows error "Unable to find a form for task xx. Try Again later or check with your administrator." and no task form is opened for that task.

      In the meanwhile, a NullPointerException occurs at DEBUG level:
      DEBUG [org.jbpm.workbench.forms.display.backend.provider.TaskFormValuesProcessor] (default task-24) Unable to generate render form: : java.lang.NullPointerException
      at org.kie.workbench.common.forms.dynamic.backend.server.context.generation.dynamic.impl.marshalling.models.MultipleSubFormFieldValueMarshaller.toFlatValue(MultipleSubFormFieldValueMarshaller.java:59)
      at org.kie.workbench.common.forms.dynamic.backend.server.context.generation.dynamic.impl.marshalling.models.MultipleSubFormFieldValueMarshaller.toFlatValue(MultipleSubFormFieldValueMarshaller.java:36)
      at org.kie.workbench.common.forms.dynamic.backend.server.context.generation.dynamic.impl.marshalling.models.ModelMarshaller.lambda$toFlatValue$0(ModelMarshaller.java:94)

      The same data work fine with rhpam 7.0 alpha version. It breaks on 7.0.0.GA and 7.0.2.GA.

      I'm attaching a simple reproducer here for reference.

      We are looking for a fix that could open the existing tasks that were created using 7.0.0 alpha version. Those tasks were able to be opened in alpha version. After migrating to 7.0.0.GA or 7.0.2.GA version those tasks are not able to be opened.

        1. reproducer-02182967.zip
          219 kB

              elguardian@gmail.com Enrique González Martínez (Inactive)
              rhn-support-ghu Gary Hu
              Klara Bezdekova Klara Bezdekova
              Klara Bezdekova Klara Bezdekova
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                Created:
                Updated:
                Resolved: