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KIP-848: The Next Generation of the Consumer Rebalance Protocol introduces new status in consumer group like group epoch, target assignment epoch, member epoch, and target assignment. Adding this information to kafka-consumer-groups.sh command and kafka-share-groups.sh commands can help administrator to have a detailed view of the state of the groups.

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$ bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group my-group --members
GROUP		CONSUMER-ID            HOST            CLIENT-ID   			ASSIGNMENT		GROUP-EPOCH 	TARGET-ASSIGNMENT-EPOCH		CONSUMER-EPOCH
my-group	T4tbGKsvT7CtsxVBH5J2QQ /127.0.0.1      consumer-my-group-1	my_topic:0		1				1							1

--state

$ bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group my-group --state
GROUP		COORDINATOR (ID)          STATE           	#MEMBERS 	GROUP-EPOCH		TARGET-ASSIGNMENT-EPOCH
my-group	localhost:61316  (0)      Stable			1			1				1

Compatibility, Deprecation, and Migration Plan

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