Both from argus's review on the PR, both non-blocking, both real.
The HTTP client had no timeout, and it runs INSIDE the auth callback: a
token endpoint that accepts the connection and then never answers would
hang the callback and the connection attempt that invoked it, with no
retry and nothing in the log to say why. That is the same hang class the
status endpoint's connection-state check exists to prevent, one layer up.
Failing fast lets async-nats back off and try again, which it already
does well.
And the startup log said "connected to the swarm queue" at a point where
`retry_on_initial_connect` guarantees no connection has been established
yet - so the journal would read "connected", then 503 "not connected"
moments later, and a reader would rightly distrust the second line rather
than the first.
465d68d5a7