[KAFKA-8891] invalid assignment protocol java.lang.IllegalStateException: Coordinator selected invalid assignment protocol: null

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.4.0
• Assignee: Unassigned
• Reporter: SAIRAM KODURU
• Created: 10/Sep/19 09:00
• Updated: 17/Oct/19 05:55
• Resolved: 17/Oct/19 05:55

Description

we are using  0.11.0.2 kafka client in our application.
we have observed the below mentioned error and got flooded with logs in crores.

java.lang.IllegalStateException: Coordinator selected invalid assignment protocol: null
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:218)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:367)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:316)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:297)
at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1078)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1043)

 

But we are not able to reproduce the issue  ? 
we would like to know ,what are the possibilities of this error ? 

How to handle this exception?

Issue Links

• is part of: KAFKA-8104 Consumer cannot rejoin to the group after rebalancing