abbccdda commented on a change in pull request #8621:
URL: https://github.com/apache/kafka/pull/8621#discussion_r421759079
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File path: docs/streams/upgrade-guide.html
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@@ -52,6 +52,20 @@ <h1>Upgrade Guide and API Changes</h1>
<li> restart all new ({{fullDotVersion}}) application instances </li>
</ul>
+ <p>
+ As of Kafka Streams 2.6.x a new processing mode
<code>"exactly_once_beta"</code> (configurable via parameter
+ <code>processing.guarantee</code>) is available.
+ To use this new feature, your brokers must be on version 2.5.x or
newer.
Review comment:
We could also mention the potential outcome if broker is not on >=
2.5.x, which is a hard crash in this transition.
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