** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1497980
Title:
DB Exception during rescheduling
Status in neutron:
Fix Released
Bug description:
The follwoing trace can be seen on Kilo code during router failover:
28608 ERROR neutron.db.l3_agentschedulers_db
[req-a4af4755-6bf4-4082-bf0f-f5ad12e341ac ] Exception encountered during router
rescheduling.
28608 TRACE neutron.db.l3_agentschedulers_db Traceback (most recent call
last):
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/neutron/db/l3_agentschedulers_db.py", line
121, in reschedule_routers_from_down_agents
28608 TRACE neutron.db.l3_agentschedulers_db self.reschedule_router(context,
binding.router_id)
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/neutron/db/l3_agentschedulers_db.py", line
263, in reschedule_router
28608 TRACE neutron.db.l3_agentschedulers_db self._unbind_router(context,
router_id, agent['id'])
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/neutron/db/l3_dvrscheduler_db.py", line 357,
in _unbind_router
28608 TRACE neutron.db.l3_agentschedulers_db
self.unbind_snat_servicenode(context, router_id)
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/neutron/db/l3_dvrscheduler_db.py", line 317,
in unbind_snat_servicenode
28608 TRACE neutron.db.l3_agentschedulers_db binding =
self.unbind_snat(context, router_id)
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/neutron/db/l3_dvrscheduler_db.py", line 265,
in unbind_snat
28608 TRACE neutron.db.l3_agentschedulers_db binding = query.one()
28608 TRACE neutron.db.l3_agentschedulers_db File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2378, in one
28608 TRACE neutron.db.l3_agentschedulers_db "Multiple rows were found for
one()")
28608 TRACE neutron.db.l3_agentschedulers_db MultipleResultsFound: Multiple
rows were found for one()
User impact: In case such condition is hit (multiple bindings for snat
router) rescheduling will always fail, potentially preventing routers
to failover.
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