Newly added consumers with different version of library in group are not consuming from subscribed topics.

[shuklalok]

Description

Newly added consumers in group are not consuming from subscribed topics.

How to reproduce

In consumer group C1 , some consumers are running with the version confluentinc/confluent-kafka-go v1.8.2 and subscribed to topics T1, T2, T3.
Now we create new consumers in the same group but new consumers are running with confluentinc/confluent-kafka-go v2.0.2 and subscribe to separate set of topics T4, T5, T6.

The second set of consumers are not able to read from the subscribed topic.

Checklist

Please provide the following information:

• confluent-kafka-go and librdkafka version (LibraryVersion()):
• Apache Kafka broker version:
• Client configuration: ConfigMap{...}
• Operating system:
• Provide client logs (with "debug": ".." as necessary)
• Provide broker log excerpts
• Critical issue