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https://issues.apache.org/jira/browse/KAFKA-16073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17803977#comment-17803977
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hzh0425 edited comment on KAFKA-16073 at 1/7/24 3:50 PM:
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Sure:[~ckamal] [~satish.duggana]
[https://github.com/apache/kafka/pull/15141]
was (Author: JIRAUSER298236):
Sure:
https://github.com/apache/kafka/pull/15141
> Kafka Tiered Storage Bug: Consumer Fetch Error Due to Delayed
> localLogStartOffset Update During Segment Deletion
> ----------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-16073
> URL: https://issues.apache.org/jira/browse/KAFKA-16073
> Project: Kafka
> Issue Type: Bug
> Components: core, Tiered-Storage
> Affects Versions: 3.6.1
> Reporter: hzh0425
> Assignee: hzh0425
> Priority: Major
> Labels: KIP-405, kip-405, tiered-storage
> Fix For: 3.6.1, 3.8.0
>
>
> The identified bug in Apache Kafka's tiered storage feature involves a
> delayed update of {{localLogStartOffset}} in the
> {{UnifiedLog.deleteSegments}} method, impacting consumer fetch operations.
> When segments are deleted from the log's memory state, the
> {{localLogStartOffset}} isn't promptly updated. Concurrently,
> {{ReplicaManager.handleOffsetOutOfRangeError}} checks if a consumer's fetch
> offset is less than the {{{}localLogStartOffset{}}}. If it's greater, Kafka
> erroneously sends an {{OffsetOutOfRangeException}} to the consumer.
> In a specific concurrent scenario, imagine sequential offsets: {{{}offset1 <
> offset2 < offset3{}}}. A client requests data at {{{}offset2{}}}. While a
> background deletion process removes segments from memory, it hasn't yet
> updated the {{LocalLogStartOffset}} from {{offset1}} to {{{}offset3{}}}.
> Consequently, when the fetch offset ({{{}offset2{}}}) is evaluated against
> the stale {{offset1}} in {{{}ReplicaManager.handleOffsetOutOfRangeError{}}},
> it incorrectly triggers an {{{}OffsetOutOfRangeException{}}}. This issue
> arises from the out-of-sync update of {{{}localLogStartOffset{}}}, leading to
> incorrect handling of consumer fetch requests and potential data access
> errors.
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