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Reviewed:  https://review.opendev.org/c/openstack/neutron/+/942156
Committed: https://opendev.org/openstack/neutron/commit/c9b6679b4f44843467b6de9a3f88096cf95b7766
Submitter: "Zuul (22348)"
Branch:    master

commit c9b6679b4f44843467b6de9a3f88096cf95b7766
Author: Terry Wilson <twilson@xxxxxxxxxx>
Date:   Tue Feb 18 23:30:40 2025 +0000

    Ensure string type in provnet-network-type ext_id
    
    When multiple segments exist, or when deleting all segments, the
    provider:network_type can be None which is not a valid value
    for an ovsdb external_id column, which only stores strings.
    
    Closes-Bug: #2098815
    Change-Id: I7312570520bfc0e3d5e8e68cf065577cd3dc8786


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/2098815

Title:
  attempting to write bad value to column external_ids (ovsdb error:
  expected string, got <class 'NoneType'>)

Status in neutron:
  Fix Released

Bug description:
  When running the 'test_network_segments_localnet_ports' functional
  test, I saw these errors in the logs:

  2025-02-18 21:34:28.816 1676661 DEBUG neutron.tests.unit.plugins.ml2.drivers.mechanism_logger [None req-e5eeb5c0-8d48-420d-b616-95dc862021ba - 46f70361-ba71-4bd0-9769-3573fd227c4b - - - -] update_network_postcommit:
   _log_diff_call /opt/stack/neutron/neutron/tests/unit/plugins/ml2/drivers/mechanism_logger.py:59
  2025-02-18 21:34:28.818 1676661 ERROR ovsdbapp.backend.ovs_idl.vlog [None req-e5eeb5c0-8d48-420d-b616-95dc862021ba - 46f70361-ba71-4bd0-9769-3573fd227c4b - - - -] attempting to write bad value to column external_ids (ovsdb error: expected string, got <class 'NoneType'>): ovs.db.error.Error: ovsdb error: expected string, got <class 'NoneType'>

  It appears to be happening because the neutron:provnet-network-type is
  None at the time, and external_ids must be string:string maps.

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