Starting task fails with"Unexpected error during processing: User null was not found in callback"

Solution In Progress - Updated -

Issue

  1. I start a process with adminuser. In the process there's a task assigned to "user3" and "user6".
  2. I log in with user3 (or user6, it's the same), I see the task in the inbox, and I claim it correctly. but when I try to start it I get the error:
Unexpected error occurred: Unexpected HTTP response code when requesting URI 'http://kie-server-host:80/services/rest/server/containers/test_1.0.0-SNAPSHOT/tasks/11/states/started'! Error code: 500, message: "Unexpected error during processing: User null was not found in callback org.jbpm.services.task.identity.LDAPUserGroupCallbackImpl@235912e1"

Environment

  • Red Hat Process Automation Manager (RHPAM)
    • 7.x

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