Taking long time to publish event to Event hub after 1 hour of idle time

[prashant-gudodagi-by]

Description

Connected to Azure Event Hub, In a normal working scenario with no idle time, the events gets published to event hub within milliseconds, but if there is an idle time of 1 hour, the first event sent after idle time takes 30 secs.

Framework: Spring
Parameters used for Producer:
KEY_SERIALIZER_CLASS_CONFIG
VALUE_SERIALIZER_CLASS_CONFIG
COMPRESSION_TYPE_CONFIG

other properties will be considered default..

How to reproduce

Connect to Azure Event hub, using the above mentioned config values (org.apache.kafka.clients.producer.ProducerConfig).

After connecting send couple of messages.(1st request takes time to publish and all other subsequent events gets published in fraction)
get idle time of 1 hour.
Now publish a new message, it takes almost 30 Secs.

Has it worked previously?

<Is this a first attempt at getting the sample application to run, or has it worked in the past?>

Checklist

IMPORTANT: We will close issues where the checklist has not been completed or where adequate information has not been provided.

Please provide the relevant information for the following items:

• SDK (include version info): <REPLACE with e.g., kafka-python/Java SDK/confluent-kafka-dotnet with version info>
• Sample you're having trouble with: <REPLACE with e.g., Java quickstart>
• If using Apache Kafka Java clients or a framework that uses Apache Kafka Java clients, version: <REPLACE with e.g., 1.1.0>
• Kafka client configuration: <REPLACE with e.g., auto.reset.offset=earliest, ..> (do not include your connection string or SAS Key)
• Namespace and EventHub/topic name
• Consumer or producer failure <REPLACE with e.g., Consumer failure>
• Timestamps in UTC <REPLACE with e.g., Nov 7 2018 - 17:15:01 UTC>
• group.id or client.id <REPLACE with e.g., group.id=cg-name>
• Logs provided (with debug-level logging enabled if possible, e.g. log4j.rootLogger=DEBUG) or exception call stack
• Standalone repro <REPLACE with e.g., Willing/able to send scenario to repro issue>
• Operating system: <REPLACE with e.g., Ubuntu 16.04.5 (x64) LTS>
• Critical issue

If this is a question on basic functionality, please verify the following:

• Port 9093 should not be blocked by firewall ("broker cannot be found" errors)
• Pinging FQDN should return cluster DNS resolution (e.g. $ ping namespace.servicebus.windows.net returns ~ ns-eh2-prod-am3-516.cloudapp.net [13.69.64.0])
• Namespace should be either Standard or Dedicated tier, not Basic (TopicAuthorization errors)

[arerlend]

Hey @prashant-gudodagi-by can you try setting all of the configuration found in the config doc? Setting max idle timeout for connections should help you.

https://github.com/Azure/azure-event-hubs-for-kafka/blob/master/CONFIGURATION.md

[arerlend]

@prashant-gudodagi-by any update?