Michał Łukowicz created KAFKA-12167:
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Summary: Consumer group does not rebalance properly when joining
more than one node
Key: KAFKA-12167
URL: https://issues.apache.org/jira/browse/KAFKA-12167
Project: Kafka
Issue Type: Bug
Components: consumer
Affects Versions: 2.6.0
Reporter: Michał Łukowicz
Hi
We have spotted strange issue:
Joining more than one consumer to consumer group fails not leaving absolutely
any information in broker logs.
We though that this may have been
https://issues.apache.org/jira/browse/KAFKA-9752 but after upgrading client
libs to 2.5 we still faced same issue(brokers are 2.6).
We reviewed logs and could not find anything.
After investigating the only thing that is bad about this cluster is huge
amount of dead consumer(no longer used) groups which we will be clearing
shortly - however there are no other clues that anything is wrong with cluster.
We have issue solved by restarting cluster 2 / 3 times, recreating topic &
consumer group.
If you need any more specific information pls let me know.
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