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MINOR: add java 8/scala 2.12 deprecation info in doc (#12261) 

Reviewers: Ismael Juma <mlists@juma.me.uk>
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Luke Chen 2022-06-09 09:39:23 +08:00 committed by GitHub
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docs/ops.html
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@ -1266,7 +1266,8 @@ $ bin/kafka-acls.sh \
<h3 class="anchor-heading"><a id="java" class="anchor-link"></a><a href="#java">6.6 Java Version</a></h3>
Java 8 and Java 11 are supported. Java 11 performs significantly better if TLS is enabled, so it is highly recommended (it also includes a number of other
Java 8, Java 11, and Java 17 are supported. Note that Java 8 support has been deprecated since Apache Kafka 3.0 and will be removed in Apache Kafka 4.0.
Java 11 and later versions perform significantly better if TLS is enabled, so they are highly recommended (they also include a number of other
performance improvements: G1GC, CRC32C, Compact Strings, Thread-Local Handshakes and more).
From a security perspective, we recommend the latest released patch version as older freely available versions have disclosed security vulnerabilities.

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docs/upgrade.html
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@ -217,7 +217,10 @@
See <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-679%3A+Producer+will+enable+the+strongest+delivery+guarantee+by+default">KIP-679</a> for details.
In 3.0.0 and 3.1.0, a bug prevented the idempotence default from being applied which meant that it remained disabled unless the user had explicitly set
<code>enable.idempotence</code> to true. Note that the bug did not affect the <code>acks=all</code> change. See <a href="https://issues.apache.org/jira/browse/KAFKA-13598">KAFKA-13598</a>for more details.
This issue was fixed and the default is properly applied in 3.0.1, 3.1.1, and 3.2.0.
This issue was fixed and the default is properly applied in 3.0.1, 3.1.1, and 3.2.0.</li>
<li>Java 8 and Scala 2.12 support have been deprecated since Apache Kafka 3.0 and will be removed in Apache Kafka 4.0.
See <a href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181308223">KIP-750</a>
and <a href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181308218">KIP-751</a> for more details.</li>
<li>ZooKeeper has been upgraded to version 3.6.3.</li>
<li>A preview of KRaft mode is available, though upgrading to it from the 2.8 Early Access release is not possible. See
the <code>config/kraft/README.md</code> file for details.</li>