Open Stack

In addition to what Mike said, "Lock wait timeout exceeded" sounds like an
error from the C-based mysql driver that eventlet couldn't recognize
yielding calls on. We have moved away from that upstream for quite some
time now. Ensure your DB connection string starts with 'mysql+pymysql://'
to use the pymysql one.

On Tue, May 10, 2016 at 4:54 PM, Mike Bayer <mbayer at redhat.com> wrote:

>
>
> On 05/10/2016 04:57 PM, Divya wrote:
>
>> Hi,
>>     I am trying to run this rally test on stable/kilo
>>
>> https://github.com/openstack/rally/blob/master/samples/tasks/scenarios/neutron/create_and_delete_routers.json
>>
>> with concurrency 50 and iterations 2000.
>>
>> This test basically cretaes routers and subnets
>> and then calls
>> router-interface-add
>> router-interface-delete
>>
>>
>> And i am running this against 3rd party Nuage plugin.
>>
>> In the NuagePlugin:
>>
>> add_router_interface is something like this:
>> ----------------------------
>> super().add_router_interface
>> try:
>>    some calls to external rest server
>>    super().delete_port
>> except:
>>
>> remove_router_interface:
>> -----------------------------------
>> super().remove_router_interface
>> some calls to external rest server
>> super().create_port()
>> some calls to external rest server
>>
>>
>> If i comment delete_port in the add_router_interface, i am not hitting
>> the db lockout issue.
>> delete_port or any other operations are not within any transaction.
>> So not sure, why this is leading to db lock timeouts in insert to
>> routerport
>>
>> error trace
>> http://paste.openstack.org/show/496626/
>>
>>
>>
>> Really appreciate any help on this.
>>
>
>
> I'm not on the Neutron team, but in general, Openstack applications should
> be employing retry logic internally which anticipates database deadlocks
> like these and retries the operation.  I'd report this stack trace
> (especially if it is reproducible) as a bug to this plugin's launchpad
> project.
>
>
>
>
>> Thanks,
>> Divya
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> __________________________________________________________________________
>> OpenStack Development Mailing List (not for usage questions)
>> Unsubscribe:
>> OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>
>>
> __________________________________________________________________________
> OpenStack Development Mailing List (not for usage questions)
> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20160510/58df6940/attachment.html>