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https://issues.apache.org/jira/browse/BEAM-727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862260#comment-16862260
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Ismaël Mejía commented on BEAM-727:
-----------------------------------

As a follow up on this one, it seems we can now use the `Watch` transform + SDF 
to achieve this. As 
[reference|https://github.com/apache/beam/pull/8718#discussion_r292985827] 

> KafkaIO should support dynamic addition of Kafka partitions to assigned 
> topics. 
> --------------------------------------------------------------------------------
>
>                 Key: BEAM-727
>                 URL: https://issues.apache.org/jira/browse/BEAM-727
>             Project: Beam
>          Issue Type: Improvement
>          Components: io-java-kafka
>            Reporter: Amit Sela
>            Priority: Minor
>
> Kafka topics may add partitions dynamically (doesn't require Kafka to 
> restart, or halt a topic), and the KafkaIO should probably support this.
> *Note:* 
> Consistently assigning partitions should be taken into account, specifically 
> for the case of reading from multiple topics, where one (or more) of the 
> topics added partitions while the pipeline is running.



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