[openstack-dev] [Neutron] Issue with pymysql

Salvatore Orlando sorlando at nicira.com
Fri Jun 12 05:17:33 UTC 2015

It is however interesting that both "lock wait timeouts" and "missing
savepoint" errors occur in operations pertaining the same table -
securitygroups in this case.
I wonder if the switch to pymysl has not actually uncovered some other bug
in Neutron.

I have no opposition to a revert, but since this will affect most projects,
it's probably worth finding some time to investigate what is triggering
this failure when sqlalchemy is backed by pymysql before doing that.


On 12 June 2015 at 03:32, Eugene Nikanorov <enikanorov at mirantis.com> wrote:

> Hi neutrons,
> I'd like to draw your attention to an issue discovered by rally gate job:
> http://logs.openstack.org/96/190796/4/check/gate-rally-dsvm-neutron-rally/7a18e43/logs/screen-q-svc.txt.gz?level=TRACE
> I don't have bandwidth to take a deep look at it, but first impression is
> that it is some issue with nested transaction support either on sqlalchemy
> or pymysql side.
> Also, besides errors with nested transactions, there are a lot of Lock
> wait timeouts.
> I think it makes sense to start with reverting the patch that moves to
> pymysql.
> Thanks,
> Eugene.
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