rabbitmq: channel level exception recovery - rabbitmq

Question

I am working on a worker service that consume from rabbitmq queue and I am trying to figure out how to handle channel shut down event, for example: lets say my consumer didn't ack the broker for 30 minutes and the broker shut down the channel for that.
I know the rabbitmq clinet library (I am using the C# library) will automatically try to re-connect on connection shut down, but what is the best practice for when the connection is alive but the channel was closed? I can register handler for the 'Channel Shut Down' event but what should I do inside this handler except for logging it? I want to keep consuming from the the relevant queue after all.
here is my code, i tried to create the channel again but i get timeout exception for that:
var consumer = ...
channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);
channel.BasicQos(0, 100, false);
channel.ModelShutdown += (sender, args) =>
{
try
{
Log.Error($"channel was shut down");
channel = _connection.CreateModel();
channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);
channel.BasicQos(0, 100, false)
}
catch (Exception exception)
{
Log.Error(exception);
}

Answer 1

As far as I understand, the problem is related to the fact that the event processing occurs in the same thread that is trying to access the RabbitMQ server, or there is a lock blocking the creation of the channel. The simplest solution I've found is to just use Task.Run(() => )
private async void RecreateChannel(object sender, ShutdownEventArgs e)
{
_logger.LogWarning($"Channel was shutdowned, whit reason: {e.ReplyText}, code: {e.ReplyCode}, trying to reconnect");
_channel.Dispose();
while (!_channel.IsOpen)
{
try
{
await Task.Run(() => _channel = InitChannel());
}
catch (Exception exception)
{
_logger.LogError(exception, "Failed to recreate channel, trying again");
}
}
_logger.LogInformation("Channel was recreated successfully");
}