Dear @TsuyoshiUshio and @fbeltrao,

firstly, I would like to apologize for bumping into the review process at #186 (comment) and #186 (comment). Let's better continue a more thorough discussion here.

As a followup to #185, I would like to dedicate this topic a separate issue regarding

I would like to emphasize that it is probably also crucial to apply the recommended configuration settings for Kafka on Azure as outlined within confluentinc/librdkafka#3109 (comment).

As we found out recently, Microsoft published some recommended configuration properties for librdkafka at [1]. It would be nice if the Azure function bindings for Kafka would already use these recommendations out of the box. I didn't check the code base thoroughly yet, so I am humbly asking for your support on that for the upcoming release when the bump to librdkafka 1.5.2 will take place.

As outlined within [1], the configuration properties socket.keepalive.enable and metadata.max.age.ms are crucial to get right within Azure environments in order to save users from running into issues like outlined within confluentinc/librdkafka#3109. I strongly recommend to apply these default values out of the box as most regular users will not be aware of them and might experience nasty things.

While these settings [1] are primarily dedicated to Event Hubs, they will also apply to all communications with vanilla Kafka server components, as the underlying networking infrastructure problem outlined within confluentinc/librdkafka#3109 will be the same.

Thanks for listening and with kind regards,
Andreas.

[1] https://docs.microsoft.com/en-us/azure/event-hubs/apache-kafka-configurations#librdkafka-configuration-properties