1) Contacts crash "c is null":
contactRepository.Search declared `var contacts []models.Contact` so
an empty result set returned a nil slice, which Go marshals as JSON
null. The frontend's flatMap((p) => p.data) over null yields [null],
and the page then accesses c.subscribed → throws. Initialize as
make([]models.Contact, 0, limit+1) so the wire format is always [].
Also defensive on the client: useSearchContacts + useCampaigns now
coerce p.data ?? [] and drop nulls before returning.
2) Campaigns panic on any non-empty result:
campaignRepository.Search allocated `make([]models.Campaign, 0, limit+1)`
(length 0) then did `campaigns[i] = campaign`. That's an
index-out-of-range on the first iteration. Switched to `append`.
Anyone with at least one campaign would see a 500 / blank screen.
3) Websocket "Token expired":
SocketTTL was 60s. The frontend reconnect backoff caps at 30s, so
after a rejected handshake the next attempt could fire 30-60s
later. Combined with rare back-pressure on /getaway the token was
already past exp by the time the realtime saw it. Bumped to 10 min
— short enough to keep the token low-impact, long enough to outlast
the backoff schedule.
4) Websocket "Connection limit exceeded":
Realtime.Connections only untracked on channel terminate, never on
socket disconnect. Sockets that connected and disconnected without
joining a channel leaked. Each reconnect loop bumped the counter
until the per-user limit (10) was hit, after which every legitimate
connect was rejected even after fixing #3.
Fix: GenServer Process.monitor's the socket pid on track, and
`:DOWN` handler calls do_untrack with the right (user_id, ip).
5) Phoenix protocol mismatch:
Frontend appended vsn=2.0.0 to the WS URL, but sendRaw + joinChannel
send the V1 object format. Realtime's Phoenix.Socket.V2.JSONSerializer
crashed with a badmatch on the first phx_join, killing the socket
right after connect. Switched to vsn=1.0.0 to match what the client
actually emits.
Matthew Meszaros