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KAFKA-19751: KAFKA-19751: add Java 21, 23 to 3.9 supported version #747

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Nov 16, 2025
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KAFKA-19751: KAFKA-19751: add Java 21, 23 to 3.9 supported version #747

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4 changes: 2 additions & 2 deletions 39/ops.html
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Expand Up @@ -1249,10 +1249,10 @@ <h4 class="anchor-heading"><a id="prodconfig" class="anchor-link"></a><a href="#

<h3 class="anchor-heading"><a id="java" class="anchor-link"></a><a href="#java">6.6 Java Version</a></h3>

Java 8, Java 11, and Java 17 are supported.
Java 8, Java 11, Java 17, Java 21 and Java 23 are supported.
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@ijuma ijuma Nov 17, 2025

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Not sure we want to include Java 23, which is a non LTS version that is not supported by anyone else.

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@chia7712 chia7712 Nov 17, 2025

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That's a good question. Since the 3.9 branch will be a specific version with potentially many patch releases, its lifecycle may be inconsistent with the JDK EOL schedule.

Perhaps we should state that JDK 23 is used by the CI but is not officially supported by Apache Kafka due to its EOL status. We can adopt this strategy again when JDK 8 reaches its EOL.

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@FrankYang0529 FrankYang0529 Nov 17, 2025

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JDK 23 is EOL in March 2025. We can mention it's one of JDK version which is used in CI and it's not officially supported. I will create another PR for this.

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@FrankYang0529 FrankYang0529 Nov 17, 2025

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#748

<p>
Note that Java 8 support project-wide has been deprecated since Apache Kafka 3.0 and Java 11 support for the broker and tools
has been deprecated since Apache Kafka 3.7. Both will be removed in Apache Kafka 4.0.
has been deprecated since Apache Kafka 3.7. Both have been removed in Apache Kafka 4.0.
<p>
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).
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