You are viewing a plain text version of this content. The canonical link for it is here.

Posted to jira@kafka.apache.org by "Lan Ding (Jira)" <ji...@apache.org> on 2026/01/04 16:26:00 UTC

[jira] [Assigned] (KAFKA-20030) Document considerations and side effects of dynamic partition expansion

     [ https://issues.apache.org/jira/browse/KAFKA-20030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lan Ding reassigned KAFKA-20030:
--------------------------------

    Assignee: Lan Ding  (was: Chia-Ping Tsai)

> Document considerations and side effects of dynamic partition expansion
> -----------------------------------------------------------------------
>
>                 Key: KAFKA-20030
>                 URL: https://issues.apache.org/jira/browse/KAFKA-20030
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Chia-Ping Tsai
>            Assignee: Lan Ding
>            Priority: Minor
>
> We should update the documentation to list important considerations when users dynamically increase the number of partitions for a topic.
> Key points to include:
>  # *Key Distribution Changes:* The default partitioner’s mapping logic (e.g., hash of the key) changes when the partition count increases, which may affect message ordering for existing keys.
>  # *Potential Data Loss with {{{}latest{}}}:* Existing consumers configured with {{auto.offset.reset=latest}} might miss messages produced to the new partitions during the window between partition creation and consumer discovery.
>  # *Metadata Propagation Delay:* New partitions are not immediately visible to producers and consumers due to metadata refresh intervals.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)