Looking at the log involving the server ( - the same one you provided
in the first comment and in comment #3), and specifically lines 19 and
21, it's clear that sync_routers() is triggering
auto_schedule_routers(). Before  removed in, the call from
sync_routers() to auto_schedule_routers() was done in line 96 of
neutron/api/rpc/handlers/l3_rpc.py, as can be observed from the log:
2016-10-09 17:03:52.366 144166 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/neutron/api/rpc/handlers/l3_rpc.py", line 96,
2016-10-09 17:03:52.366 144166 ERROR oslo_messaging.rpc.dispatcher
self.l3plugin.auto_schedule_routers(context, host, router_ids)
In , it's evident that the line 96 itself is removed. Thus, this
can't be reproduced in master or in stable/mitaka and there is no
(upstream) bug to fix.
** Changed in: neutron
Status: New => Invalid
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Partial HA network causing HA router creation failed (race conditon)
Status in neutron:
Neutron API: two neutron-servers behind a HA proxy VIP.
Log  shows that the subnet of HA network is concurrently deleted
while a new HA router create API comes. Seems the race conditon
described in this bug is till exists :
https://bugs.launchpad.net/neutron/+bug/1533440, where has description
Some known exceptions:
2. IpAddressGenerationFailure: (HA port created failed due to the
concurrently HA subnet deletion)
Log  has a very strange behavior that those 3 APIs have a same
Just create one HA router for a tenant, and then quickly delete it.
For now, our mitaka ENV use VxLAN as tenant network type. So there is a very
large range of VNI.
So don't save that, and locally a temporary solution, we add a new config to
decide whether delete the HA network every time.
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