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https://issues.apache.org/jira/browse/KAFKA-20560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18081412#comment-18081412
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TaiJuWu commented on KAFKA-20560:
---------------------------------
KIP:
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-1343%3A+Allow+opt-in+leader-only+acknowledgement+in+DeleteRecords]
> Support non-blocking DeleteRecordsRequest
> -----------------------------------------
>
> Key: KAFKA-20560
> URL: https://issues.apache.org/jira/browse/KAFKA-20560
> Project: Kafka
> Issue Type: New Feature
> Reporter: Chia-Ping Tsai
> Assignee: TaiJuWu
> Priority: Minor
> Labels: need-kip
>
> Currently, DeleteRecords blocks until all in-sync replicas (ISR) advance the
> low watermark. This means a single slow follower can stall the request, and
> users can't distinguish the root cause from the timeout. If users set
> timeout=0 to simulate a non-blocking request, the ExpiresPerSec metric will
> be increased unintentionally.
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