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https://issues.apache.org/jira/browse/KAFKA-17125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18055688#comment-18055688
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Colt McNealy commented on KAFKA-17125:
--------------------------------------

[~mjsax] that's a good idea; we are keen on being able to track missing 
features such as Warmup Replicas (HAAssignor) and online migration.

We are excited to start soak testing the Streams Rebalance Protocol (and plan 
to do so once 4.2.0 is out) but we cannot move to it in production until those 
two features are available. We deploy a KS app per customer and have many 
clusters live; we cannot have a maintenance window for an offline migration. 
Additionally, when customers increase their workload we must scale out and our 
users cannot tolerate downtime during that process.

Overall, we are very excited about this feature! Thank you and the whole team 
for all of the hard work. This is a huge and exciting step.

>  Streams Rebalance Protocol
> ---------------------------
>
>                 Key: KAFKA-17125
>                 URL: https://issues.apache.org/jira/browse/KAFKA-17125
>             Project: Kafka
>          Issue Type: New Feature
>          Components: streams
>            Reporter: Lucas Brutschy
>            Assignee: Lucas Brutschy
>            Priority: Major
>              Labels: kip
>
> This ticket tracks the implementation of the Streams Rebalance Protocol, as 
> proposed in 
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-1071%3A+Streams+Rebalance+Protocol



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