emqtt library : client disconnected from broker even if keepalive is set to 300s

[cocoaway]

Hi,
I've set keepalive value to 300s on client , written in elixir.
The broker (emqx) shows '60' sec.

In config.exs
keepalive: System.get_env("MQ_KEEPALIVE", "300") |> String.to_integer()

Error message :
(EXIT from #PID<0.233.0>) shell process exited with reason: {:disconnected, 141, %{}}

[qzhuyan]

broker is able to overwrite the keepalive value, could you check what is set at the broker side? or the Server Keep Alive value in connack from the broker?