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https://issues.apache.org/jira/browse/KAFKA-7141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539373#comment-16539373
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James Cheng commented on KAFKA-7141:
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I think it's a little odd that kafka-consumer-groups doesn't show partition
assignment at all, when there are no offsets.
Currently, if there are 2 partitions (partitions 1 and 2)
* A) Active consumer, no committed offsets on either of them means that you
see nothing. No group assignment, no partitions.
* B) Active consumer, committed offsets on 1, no committed offsets on 2, means
that you will see rows for both of them, but the CURRENT-OFFSET field for
partition 2 will have a hyphen in it.
* C) Active consumer, Committed offsets on both 1 and 2, means you will see
all the data
* D) No active consumer, committed offsets on both 1 and 2, means you will see
the rows, but CONSUMER-ID/HOST/CLIENT-ID will have hyphens.
This Jira is talking about "A".
I would have expected that "A" would display similar to "B". That you would see
partition assignments, but "-" wherever there are missing offsets.
> kafka-consumer-group doesn't describe existing group
> ----------------------------------------------------
>
> Key: KAFKA-7141
> URL: https://issues.apache.org/jira/browse/KAFKA-7141
> Project: Kafka
> Issue Type: Bug
> Components: admin
> Affects Versions: 0.11.0.0, 1.0.1
> Reporter: Bohdana Panchenko
> Priority: Major
>
> I am running two consumers: akka-stream-kafka consumer with standard config
> section as described in the
> [https://doc.akka.io/docs/akka-stream-kafka/current/consumer.html] and
> kafka-console-consumer.
> akka-stream-kafka consumer configuration looks like this
> {color:#333333}_akka.kafka.consumer{_{color}
> {color:#333333} _kafka-clients{_{color}
> {color:#333333} _group.id = "myakkastreamkafka-1"_{color}
> {color:#333333} _enable.auto.commit = false_{color}
> }
> {color:#333333} }{color}
>
> I am able to see the both groups with the command
>
> *kafka-consumer-groups --bootstrap-server 127.0.0.1:9092 --list*
> _Note: This will not show information about old Zookeeper-based consumers._
>
> _myakkastreamkafka-1_
> _console-consumer-57171_
> {color:#333333}I am able to view details about the console consumer
> group{color}
> *kafka-consumer-groups --describe --bootstrap-server 127.0.0.1:9092 --group
> console-consumer-57171*
> _{color:#205081}Note: This will not show information about old
> Zookeeper-based consumers.{color}_
> _{color:#205081}TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID
> HOST CLIENT-ID{color}_
> _{color:#205081}STREAM-TEST 0 0 0 0
> consumer-1-6b928e07-196a-4322-9928-068681617878 /172.19.0.4 consumer-1{color}_
> {color:#333333}But the command to describe my akka stream consumer gives me
> empty output:{color}
> *kafka-consumer-groups --describe --bootstrap-server 127.0.0.1:9092 --group
> myakkastreamkafka-1*
> {color:#205081}_Note: This will not show information about old
> Zookeeper-based consumers._{color}
> {color:#205081}_TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID
> HOST CLIENT-ID_{color}
>
> {color:#333333}That is strange. Can you please check the issue?{color}
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