Hey, all. About a day ago, Neutron/MySQL started throwing errors on my
Ubuntu/Newton cloud:
2017-09-12 15:39:35.591 95710 ERROR neutron.callbacks.manager
DBReferenceError: (pymysql.err.IntegrityError) (1452, u'Cannot add or
update a child row: a foreign key constraint fails
(`neutron`.`segmenthostmappings`, CONSTRAINT
`segmenthostmappings_ibfk_1` FOREIGN KEY (`segment_id`) REFERENCES
`networksegments` (`id`) ON DELETE CASCADE)') [SQL: u'INSERT INTO
segmenthostmappings (segment_id, host) VALUES (%(segment_id)s,
%(host)s)'] [parameters: {'host': u'BL-D8-c6220-04-L', 'segment_id':
u'a0e4e56a-47e2-4f1a-a9ff-b53f60a8b2f6'}]
2017-09-12 15:39:32.753 95684 ERROR neutron.callbacks.manager
DBReferenceError: (pymysql.err.IntegrityError) (1452, u'Cannot add or
update a child row: a foreign key constraint fails
(`neutron`.`segmenthostmappings`, CONSTRAINT
`segmenthostmappings_ibfk_1` FOREIGN KEY (`segment_id`) REFERENCES
`networksegments` (`id`) ON DELETE CASCADE)') [SQL: u'INSERT INTO
segmenthostmappings (segment_id, host) VALUES (%(segment_id)s,
%(host)s)'] [parameters: ({'host': u'BL-D8-c6220-15-R', 'segment_id':
u'8cf4ed19-1e9a-4125-8d65-f8fe0fa22032'}, {'host': u'BL-D8-c6220-15-R',
'segment_id': u'3512bb5d-20a4-4873-a17a-17cd3c27efe5'}, {'host':
u'BL-D8-c6220-15-R', 'segment_id':
u'154cff0d-36a2-4083-9402-8bb977044b01'})]
etc.
I can't cause them (yet) by any individual action that I've thus-far
found, but Heat orchestrations, for example, fail a lot of the time. I
do have hourly backups of my database -- should I cut my losses and
revert? Or can anyone think of some magick(tm) that could be applied?
The database is HA, and the nodes are synced, so I don't *think* that
this is a synchronization issue. Sadly, while I'm adept as a sysadmin
in MySQL, I'm not up to the point where I can t-shoot foreign key
weirdness.
Thanks,
-Ken
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