_try_reconnect will timeout in ~ 70 secs, in case no ACK packet is received.

[creativcoder]

So i investigated the issue about blocking connection on a random port like test.mosquitto.org:1234 and the blocking happens exactly in L320. and eventually the connection timeouts as evident from the retransmittion packets sent as shown below. The error message in particular is Error { repr: Os { code: 110, message: "Connection timed out" } }

[tekjar]

Should be fixed in tokio2 branch