bufferevent pair event_cb flags
So I think I had several issues going on here, some of which are now cleaned up....
A possible clue. One of the PVs which is presistently "stuck" is: $ cainfo BR-BI{}X17-I...
PVs stuck in Initial sampling
Ha! So this seems to be a consequence of leaking FDs from my policies.py, which is...
RTYP missing in policy for non .VAL
I realized that the key 'elementCount' is already present.
Trying to add ~50k PVs in one go fails in a surprising place