Ciboulette

Ciboulette

Good evening,

I am working on a escript executable in plain elixir. I’m currently using RabbitMQ with the AMQP library which is great. I’m using rabbitMQ heartbeat to handle lack of connection. When i turn down my wifi connection there is a heartbeat_timeout and this is normal ! I just want to catch this message to avoid showing this to the user in his console, but i can’t figure it out. How can i do this ? The message in the console is below:

22:02:37.681 [error] GenServer #PID<0.257.0> terminating
** (stop) :heartbeat_timeout
Last message: :heartbeat_timeout
State: {:state, :amqp_network_connection, {:state, #Port<0.9883>, "client adress -> adress:5672", 10, #PID<0.260.0>, 131072, #PID<0.256.0>, :undefined, false}, #PID<0.259.0>, {:amqp_params_network, "1v62q9wtxu2sckso", "33oga51ho8yswo0gwswg44440kwc4k4okkksgg0kks4wkkcc08", "/", 'adress.com', 5672, 0, 0, 10, :infinity, :none, [&:amqp_auth_mechanisms.plain/3, &:amqp_auth_mechanisms.amqplain/3], [], []}, 0, [{"capabilities", :table, [{"publisher_confirms", :bool, true}, {"exchange_exchange_bindings", :bool, true}, {"basic.nack", :bool, true}, {"consumer_cancel_notify", :bool, true}, {"connection.blocked", :bool, true}, {"consumer_priorities", :bool, true}, {"authentication_failure_close", :bool, true}, {"per_consumer_qos", :bool, true}]}, {"cluster_name", :longstr, "rabbit@adress-production.localdomain"}, {"copyright", :longstr, "Copyright (C) 2007-2015 Pivotal Software, Inc."}, {"information", :longstr, "Licensed under the MPL.  See http://www.rabbitmq.com/"}, {"platform", :longstr, "Erlang/OTP"}, {"product", :longstr, "RabbitMQ"}, {"version", :longstr, "3.5.7"}], :none, false}

Showing Posts 1 to 6

PatNowak

PatNowak

Did you try to use handle_info that will for sure grab this message?

def handle_info(anything, channel) do
  # do something with that
end

It should be at the bottom of your handle_info list.

ryh

ryh

I can’t remember if I was able to suppress this by defining a terminate/2 to match :heartbeat_timeout, but it’s worth a try:

def terminate(:heartbeat_timeout, _state), do: []
Ciboulette

Ciboulette OP

Of course I’ve tried the handle_info/2 and the def terminate(:heartbeat_timeout, _state), do: [] with no success… I don’t understand why it’s not working.. It’s really important for the user experience, because the error message is scary.

josevalim

josevalim

Creator of Elixir

Look at the Logger.Translator mechanism, which will allow you handle cases like this.

Ciboulette

Ciboulette OP

Thanks, so if i understand well, I should add a translator but add_translator({module, function :: atom}) :: :ok take a module and a function in parameter, how can i know the corresponding one ?

josevalim

josevalim

Creator of Elixir

Here is a sample translator: https://github.com/elixir-plug/plug/blob/master/lib/plug/adapters/translator.ex

The idea is that you will be able to pattern match in certain cases and convert those to better error messages.

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