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Cisco Bug: CSCvt92700 - ANR-Intra can't create relation due to ENMNoIurLinkException:RNC '$RNC_name' has no iur_link

Last Modified

May 27, 2020

Products (1)

  • Cisco Mobility Services Engine

Known Affected Releases

19A.2.0

Description (partial)

Symptom:
ANR Intra is crashing and is not creating relations between nodeB belonging to different RNC. 
Appmanager logs have traceback:
$timestamp [3356:src.son.apps.appmanager.main:362:iter_loop:ERROR] application anr_intra crashed trying to do action on cell EricssonUmtsBaseCell.UmtsCell.EricssonUmtsCell(name=$cell_name)
Traceback (most recent call last):
  File "/tmp/tmpciKtht/bdist.linux-x86_64/egg/son/apps/appmanager/main.py", line 349, in iter_loop
  File "/tmp/tmpB8mkMx/bdist.linux-x86_64/egg/son/notifications/alerts.py", line 327, in app_notification_context_wrapper
  File "/tmp/tmpciKtht/bdist.linux-x86_64/egg/son/apps/anr_intra/anr_intra.py", line 341, in do_action
  File "/tmp/tmpciKtht/bdist.linux-x86_64/egg/son/apps/anr_intra/anr_intra.py", line 1174, in update_neighbors
  File "/tmp/tmpciKtht/bdist.linux-x86_64/egg/son/apps/anr_intra/anr_intra.py", line 1194, in _execute_changes
  File "/tmp/tmpciKtht/bdist.linux-x86_64/egg/son/apps/anr_intra/anr_intra.py", line 1203, in execute_changes
  File "/intucell/191.2.0/local/lib/python2.7/site-packages/son.apps-191.2.0-py2.7.egg/son/apps/anr/intra_relation_functions.py", line 62, in execute_intra_changes
    app.now, app.arbiter, force)
  File "/intucell/191.2.0/local/lib/python2.7/site-packages/son.apps-191.2.0-py2.7.egg/son/apps/anr/intra_relation_functions.py", line 120, in _create_intra_executor_and_participating_cells
    source_cell, neighbor, **change.attributes)
  File "/tmp/tmpCpPO6H/bdist.linux-x86_64/egg/son/infra/actions/oss_changes_executor.py", line 165, in new_method
  File "/tmp/tmpCpPO6H/bdist.linux-x86_64/egg/son/infra/actions/oss_changes/create_or_delete_cell_relation.py", line 11, in new_create_relation_change
  File "/intucell/191.2.0/local/lib/python2.7/site-packages/son.infra-191.2.0-py2.7.egg/son/infra/oss/ericsson/ericsson_radio_entities.py", line 1415, in create_relation
    return super(EricssonUmtsCell, self).create_relation(neighbor_cell, **kwargs)
  File "/tmp/tmpCpPO6H/bdist.linux-x86_64/egg/son/infra/oss/cell.py", line 987, in create_relation
  File "/intucell/191.2.0/local/lib/python2.7/site-packages/son.infra-191.2.0-py2.7.egg/son/infra/oss/ericsson/ericsson_radio_entities.py", line 690, in set_internal_neighbor
    raise ENMNoIurLinkException(source_cell.rnc)
ENMNoIurLinkException: RNC '$RNC_name' has no iur_link

Conditions:
The sync of the IUR Links is unstable and it prevents the commander from creating relations.
Investigation revealed that the problem is that the discovery is emptying the IUR LINKS list that sync created.
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