[jira] [Created] (KAFKA-10513) Newly added partitions are not assigned to running static consumer

["Marlon Ou (Jira)" <ji...@apache.org>]

Marlon Ou created KAFKA-10513:
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             Summary: Newly added partitions are not assigned to running static consumer
                 Key: KAFKA-10513
                 URL: https://issues.apache.org/jira/browse/KAFKA-10513
             Project: Kafka
          Issue Type: Bug
          Components: consumer
    Affects Versions: 2.6.0
            Reporter: Marlon Ou


If consumers are polling messages from a certain topic with static membership and we add new partitions to this topic while the consumers are running, no partition reassignment is ever triggered (and hence messages published into the new partitions are never consumed). 

To reproduce, simply set group instance IDs on the consumers: 
{code:java}
props.setProperty("group.instance.id", instanceId);
{code}
And then while the static consumers are running, use Kafka's admin client to add more partitions to the topic:
{code:java}
adminClient.createPartitions(...)
{code}
 



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