Custom thread group for BFD causes error - <FATAL> Express thread group not configured and "express" not found

[Justin Cattle]

No worries, I appreciate the extra info in any case.
Thanks!


Cheers,
Just


On Thu, 21 May 2026 at 12:20, David Petera <david.petera at nic.cz> wrote:

> Hi,
>
> unfortunately issues in our GitLab repo are not publicly visible due to
> inability of GitLab to have them just read only for quest users. Since we
> rely on them a lot for all sorts of things during development and planning
> we have them tightly managed. So letting people/bots open and comment
> issues would be a problem...
>
> If you need a handle for later to ask about, it is issue `labs/bird#416`.
>
> This is something we talked about and would like to fix in the future.
> If anybody has a suggestion how to have issues public and read-only in
> self-hosted GitLab, we are very much open to hearing them))
>
> Happy routing,
> David
>
> David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.
>
> On 5/19/26 18:59, Justin Cattle wrote:
>
> Acutally - just wandering, is there a publicly visible bug/issue I can use
> as a reference for this ?
>
>
> Cheers,
> Just
>
>
> On Tue, 19 May 2026 at 17:57, Justin Cattle <j at ocado.com> wrote:
>
>> Hi David,
>>
>> Glad to have surfaced the issue in that case, and we'll live with
>> the warning for now.
>> Thanks!
>>
>>
>> Cheers,
>> Just
>>
>>
>> On Tue, 19 May 2026 at 15:37, David Petera via Bird-users <
>> bird-users at network.cz> wrote:
>>
>>> Hi Just,
>>>
>>> I've briefly looked into the configuration code and it indeed seems like
>>> current implementation demands thread group for BFD to be named 'express'...
>>>
>>> This is definitely an oversight and we will fix that once we have more
>>> time on our hands.
>>> In the meantime having the warning is probably your best option)
>>>
>>> Thanks for spotting this and happy routing!
>>> David
>>>
>>> David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.
>>>
>>> On 5/19/26 14:21, Justin Cattle wrote:
>>>
>>> Hi,
>>>
>>>
>>> I've been testing migrating to bird3.  I preferred to redefine the
>>> default threading configs so that everything is explicit, rather than
>>> implicit.  But, when I defined the ¬eress" group, I got the following
>>> warning logged:
>>>
>>> <WARN> Symbol 'express' overrides existing keyword
>>>
>>>
>>> Rather than create create needless log lines, I though I would fix that
>>> by creating my own custom thread group instead, and use that for BFD.
>>>
>>> I created:
>>>
>>> thread group responsive {
>>> threads 1;
>>> max latency 10 ms;
>>> min time 1 ms;
>>> max time 10 ms;
>>> wakeup time 60 s;
>>> }
>>>
>>> protocol bfd {
>>>
>>>
>>> thread group responsive;
>>>
>>>
>>>
>>> interface "net0" {
>>> interval 1000 ms;
>>> multiplier 4;
>>> };
>>>
>>>
>>> interface "net1" {
>>> interval 1000 ms;
>>> multiplier 4;
>>> };
>>>
>>>
>>> }
>>>
>>>
>>> However, the config validation then throws the following error:
>>>
>>> <FATAL> Express thread group not configured and "express" not found
>>>
>>>
>>> Is this a bug, or something I'm doing wrong ?
>>>
>>> Thanks!
>>>
>>>
>>> Cheers,
>>> Just
>>>
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> Notice:
> This email is confidential and may contain copyright material of members
> of the Ocado Group. Opinions and views expressed in this message may not
> necessarily reflect the opinions and views of the members of the Ocado
> Group.
>
> If you are not the intended recipient, please notify us immediately and
> delete all copies of this message. Please note that it is your
> responsibility to scan this message for viruses.
>
> References to the "Ocado Group" are to Ocado Group plc (registered in
> England and Wales with number 7098618) and its subsidiary undertakings (as
> that expression is defined in the Companies Act 2006) from time to time.
> The registered office of Ocado Group plc is Buildings One & Two, Trident
> Place, Mosquito Way, Hatfield, Hertfordshire, AL10 9UL.
>
> Ocado Polska Sp. z o.o. posiada status dużego przedsiębiorcy w rozumieniu
> ustawy o przeciwdziałaniu nadmiernym opóźnieniom w transakcjach handlowych.
> / Ocado Polska Sp. z o.o. holds the status of a large enterprise under the
> Act on Counteracting Excessive Delays in Commercial Transactions.
>
>

-- 
Notice:
This email is confidential and may contain copyright material of 
members of the Ocado Group. Opinions and views expressed in this message 
may not necessarily reflect the opinions and views of the members of the 
Ocado Group.

If you are not the intended recipient, please notify us 
immediately and delete all copies of this message. Please note that it is 
your responsibility to scan this message for viruses.

References to the 
"Ocado Group" are to Ocado Group plc (registered in England and Wales with 
number 7098618) and its subsidiary undertakings (as that expression is 
defined in the Companies Act 2006) from time to time. The registered office 
of Ocado Group plc is Buildings One & Two, Trident Place, Mosquito Way, 
Hatfield, Hertfordshire, AL10 9UL.

Ocado Polska Sp. z o.o. posiada status 
dużego przedsiębiorcy w rozumieniu ustawy o przeciwdziałaniu nadmiernym 
opóźnieniom w transakcjach handlowych. / Ocado Polska Sp. z o.o. holds the 
status of a large enterprise under the Act on Counteracting Excessive 
Delays in Commercial Transactions.
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