Problem: Nubus - No module named 'univention.udm.exceptions'

Knowledge Base Community
, , , ,
1

Missing Python Module univention.udm.exceptions Prevents UMC Server Initialization in Nubus Version 1.9.1

Description

In Nubus version 1.9.1, the UMC server fails to start due to a missing Python module: univention.udm.exceptions. This results in an inability to import the core UDM module, which is crucial for administrative and user management tasks. As a consequence, the UMC backend does not initialize properly, leading to functional degradation.

Environment

  • Product: Nubus for Kurbenetes
  • Version: 1.9.1
  • Component: UMC Server (ums-umc-server-pod)
  • Namespace: $NAMESPACE
  • Runtime: Kubernetes (kubectl)
  • Container: umc-server (default)

Attachments / Logs

Log Snippet:

16.06.25 11:24:08.792  DEBUG_INIT
16.06.25 11:24:09.262  ADMIN       ( WARN    ) : Failed to import univention.lib.admember
16.06.25 11:24:09.887  MODULE      ( ERROR   ) : Could not load udm module: No module named 'univention.udm.exceptions'

Root Cause

This issue is tracked and documented in the official Univention bug tracker:
Bug #58405 - Missing Python Module univention.udm.exceptions

Steps to Reproduce

  1. Deploy Nubus version 1.9.1 in a Kubernetes environment.

  2. Run the following command to retrieve UMC server logs:

    kubectl logs -n $NAMESPACE ums-umc-server-pod

  3. Alternatively, test the module import directly inside the container:

    kubectl exec -it ums-umc-server-pod -- python3 -c "import univention.udm.exceptions"

Actual Results

Log Output:

16.06.25 11:24:09.887  MODULE      ( ERROR   ) : Could not load udm module: No module named 'univention.udm.exceptions'

Manual Import Output:

ModuleNotFoundError: No module named 'univention.udm.exceptions'

Stack Trace:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/univention/udm/__init__.py", line 108, in <module>
    from .exceptions import (
ModuleNotFoundError: No module named 'univention.udm.exceptions'

Expected Results

The umc-server container should successfully import the univention.udm.exceptions module without raising an exception. This ensures that UDM modules load properly and all user and system management capabilities remain fully operational.

:warning: Impact

  • Administrative functionality in UMC is likely non-functional or severely degraded.
  • Operations involving user provisioning, authentication, or third-party integration may fail.
  • General system management via UDM is disrupted.

Suggested Actions

  • Verify that the univention.udm Python package is present and intact in the umc-server image.
  • Confirm that all dependencies were properly installed during the image build or container initialization process.
  • Cross-reference the issue with official Univention bug tracking resources.