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Fill in the 2.8 release note for Authorizer (#9865) 

Reviewers: Ismael Juma <ismael@juma.me.uk>, Rajini Sivaram <rajinisivaram@googlemail.com>
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Cheng Tan 2021-02-10 03:24:13 -08:00 committed by GitHub
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<script id="upgrade-template" type="text/x-handlebars-template">
<h5><a id="upgrade_280_notable" href="#upgrade_280_notable">Notable changes in 2.8.0</a></h5>
<ul>
<li>
The 2.8.0 release added a new method to the Authorizer Interface introduced in
<a href="https://cwiki.apache.org/confluen ce/display/KAFKA/KIP-679%3A+Producer+will+enable+the+strongest+delivery+guarantee+by+default">KIP-679</a>.
The motivation is to unblock our future plan to enable the strongest message delivery guarantee by default.
Custom authorizer should consider providing a more efficient implementation that supports audit logging and any custom configs or access rules.
</li>
</ul>
<ul>
<li>Kafka Streams introduce a type-safe <code>split()</code> operator as a substitution for deprecated <code>KStream#branch()</code> method