I received a message about "Java 17 end of life in Jenkins." I assume this means I should install JDK21 ASAP, right? The docs don't seem to be ready for that, though.

This still only mentions JDK17:

 * https://www.jenkins.io/doc/book/installing/linux/
 * https://www.jenkins.io/doc/book/installing/linux/#installation-of-java

Update the Debian apt repositories, install OpenJDK 17, and check the installation with the commands:
...
I would assume it should now suggest using JDK21, right?

Even platform information only talk about upgrades to JDK11 and JDK17:
https://www.jenkins.io/doc/book/platform-information/

Java support and upgrade information

In addition to support policies, this chapter provides information on upgrading your Java version in Jenkins. Depending on your current Java version, there are instructions for upgrading to Java 11 and upgrading to Java 17.

Java support policy does mention JDK21, but doesn't mention a version that would break support with JDK17
https://www.jenkins.io/doc/book/platform-information/support-policy-java/index.html

Perhaps the message was sen too early in Jenkins 2.492.3?

Regards,
Maciej Nux.

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