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KAFKA-3853 asks for an improvement to the describe option of the consumer group command for new (Java API based) consumers. This command, when passed a consumer group that has no consumer (i.e., when the group state is Empty), currently reports an error indicating that there is no active member:

$ bin/kafka-consumer-groups.sh --new-consumer --bootstrap-server localhost:9092 --describe --group group1
Note: This will only show information about consumers that use the Java consumer API (non-ZooKeeper-based consumers).
Error: Consumer group 'group1' has no active members.

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