connection race condition in connection locking?

[soxofaan]

When checking the logs I noticed some cases of

            raise LockedAuthException("Setting auth while locked.")

which should not happen normally.

I think it's possible however due to race conditions or object copying related to forking off the (gunicorn) workers, but needs more investigation.

[soxofaan]

Initial setup used 2 threads, but a couple of components in the aggregator are not thread safe at the moment: caches, the back-end-connections, ...

Using 1 thread per worker should resolve this problem.

In longer term it could be considered to make things thread safe, but at the moment it's just easier to add more (gunicorn) workers.