[
https://issues.apache.org/jira/browse/KAFKA-9731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ismael Juma resolved KAFKA-9731.
--------------------------------
Resolution: Fixed
> Increased fetch request rate with leader selector due to HW propagation
> -----------------------------------------------------------------------
>
> Key: KAFKA-9731
> URL: https://issues.apache.org/jira/browse/KAFKA-9731
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 2.4.0, 2.4.1
> Reporter: Vahid Hashemian
> Assignee: Ismael Juma
> Priority: Major
> Fix For: 2.6.0
>
> Attachments: image-2020-03-17-10-19-08-987.png
>
>
> KIP-392 adds high watermark propagation to followers as a means to better
> sync up followers HW with leader. The issue we have noticed after trying out
> 2.4.0 and 2.4.1 is a spike in fetch request rate in the default selector case
> (leader), that does not really require this high watermark propagation:
> !image-2020-03-17-10-19-08-987.png|width=811,height=354!
> This spike causes an increase in resource allocation (CPU) on the brokers.
> An easy solution would be to disable this propagation (at least) for the
> default leader selector case to improve the backward compatibility.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
