With multiprocessing fork, threads are not inherited. The parent's
CaptureBus reader thread runs in the parent but module subprocesses
subscribe AFTER fork, so their SubscriberQueue entries are added to
a child-local copy of _subscribers that the parent reader never sees.
Fix: reset and restart CaptureBus in each module subprocess so it
has its own reader thread on the inherited AF_PACKET socket. Each
module gets independent packet delivery. Linux AF_PACKET allows
multiple readers on the same interface.
Cobra
7442dc24dd