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https://issues.apache.org/jira/browse/KAFKA-2857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15325152#comment-15325152
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Ishita Mandhan commented on KAFKA-2857:
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Working on this with [~vahid] and we aren't sure about what the part about all
replicas for a offset topic partition being down means. If all
__consumer_offsets partitions are down, wouldn't all the brokers be down as
well (meaning that all brokers keep the same copy of __consumer_offsets)?
> ConsumerGroupCommand throws GroupCoordinatorNotAvailableException when
> describing a non-existent group before the offset topic is created
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-2857
> URL: https://issues.apache.org/jira/browse/KAFKA-2857
> Project: Kafka
> Issue Type: Bug
> Components: tools
> Reporter: Ismael Juma
> Priority: Minor
>
> If we describe a non-existing group before the offset topic is created, like
> the following:
> {code}
> bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --new-consumer
> --describe --group gggg
> {code}
> We get the following error:
> {code}
> Error while executing consumer group command The group coordinator is not
> available.
> org.apache.kafka.common.errors.GroupCoordinatorNotAvailableException: The
> group coordinator is not available.
> {code}
> The exception is thrown in the `adminClient.describeConsumerGroup` call. We
> can't interpret this exception as meaning that the group doesn't exist
> because it could also be thrown f all replicas for a offset topic partition
> are down (as explained by Jun).
> Jun also suggested that we should distinguish if a coordinator is not
> available from the case where a coordinator doesn't exist.
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