If you aren’t using `—preload` then gunicorn should load the application fresh
for each worker and you shouldn’t have any issues.
If you are using preload, you have to recreate any existing connections on
fork. For SQLAlchemy I use:
def after_fork(registry):
registry['db_engine'].pool.recreate()
def includeme(config):
os.register_at_fork(
after_in_child=functools.partial(after_fork, config.registry),
)
— Theron
> On Nov 16, 2023, at 7:41 AM, Laurent Daverio <[email protected]> wrote:
>
> Hello list,
>
> this page seems to describe perfectly a problem I've stumbled on:
>
> https://stackoverflow.com/questions/64995178/decryption-failed-or-bad-record-mac-in-multiprocessing
>
> Namely, if you deploy with Gunicorn a Pyramid + PostgreSQL app based on the
> standard cookiecutter, you will run into problems, because the connection to
> the DB can't be shared between the processes, so each process needs to have
> its own connection to the DB.
>
> Before I start trying to develop a workaround, has anybody encountered the
> problem? How should I modify my app to make it compatible with both Waitress
> and Gunicorn?
>
> Thanks in advance,
>
> Laurent.
>
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