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Posted to issues@nifi.apache.org by "David Handermann (Jira)" <ji...@apache.org> on 2026/02/07 19:13:00 UTC

[jira] [Updated] (NIFI-15464) ConsumeKafka processor causes duplicate message processing during consumer group rebalance due to missing offset commit in onPartitionsRevoked

     [ https://issues.apache.org/jira/browse/NIFI-15464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Handermann updated NIFI-15464:
------------------------------------
    Fix Version/s: 2.8.0
       Resolution: Fixed
           Status: Resolved  (was: Patch Available)

> ConsumeKafka processor causes duplicate message processing during consumer group rebalance due to missing offset commit in onPartitionsRevoked
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-15464
>                 URL: https://issues.apache.org/jira/browse/NIFI-15464
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Pierre Villard
>            Assignee: Pierre Villard
>            Priority: Major
>             Fix For: 2.8.0
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> The new ConsumeKafka processor (using Kafka3ConnectionService) causes duplicate message processing when a consumer group rebalance occurs (e.g., when a consumer starts or stops). Unlike the legacy ConsumeKafka_2_6 processor which commits pending offsets during the onPartitionsRevoked callback, the new Kafka3ConsumerService only performs a rollback, causing uncommitted but already-processed messages to be reprocessed by other consumers in the group.



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