[jira] [Commented] (KAFKA-9543) Consumer offset reset after new segment rolling

["Alexandre Dupriez (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-9543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17039062#comment-17039062 ] 

Alexandre Dupriez commented on KAFKA-9543:
------------------------------------------

Interesting. Does the screenshot attached represent consumer lag? Do you have a self-contained reproduction use-case?

> Consumer offset reset after new segment rolling
> -----------------------------------------------
>
>                 Key: KAFKA-9543
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9543
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 2.4.0
>            Reporter: Rafał Boniecki
>            Priority: Major
>         Attachments: Untitled.png
>
>
> After upgrade from kafka 2.1.1 to 2.4.0, I'm experiencing unexpected consumer offset resets.
> Consumer:
> {code:java}
> 2020-02-12T11:12:58.402+01:00 hostname 4a2a39a35a02 [2020-02-12T11:12:58,402][INFO ][org.apache.kafka.clients.consumer.internals.Fetcher] [Consumer clientId=logstash-1, groupId=logstash] Fetch offset 1632750575 is out of range for partition stats-5, resetting offset
> {code}
> Broker:
> {code:java}
> 2020-02-12 11:12:58:400 CET INFO  [data-plane-kafka-request-handler-1][kafka.log.Log] [Log partition=stats-5, dir=/kafka4/data] Rolled new log segment at offset 1632750565 in 2 ms.{code}
> All resets are perfectly correlated to rolling new segments at the broker - segment is rolled first, then, couple of ms later, reset on the consumer occurs. Attached is grafana graph with consumer lag per partition. All sudden spikes in lag are offset resets due to this bug.



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