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[docs] Document JDK 21 since Logstash 8.15.0 #16780

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[docs] Document JDK 21 since Logstash 8.15.0 #16780

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14 changes: 7 additions & 7 deletions docs/static/jvm.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,8 @@

{ls} requires one of these versions:

* Java 17 (default). Check out <<jdk17-upgrade>> for settings info.
* Java 21
* Java 17. Check out <<jdk17-upgrade>> for settings info.
* Java 21 (default since 8.15.0)

Use the
http://www.oracle.com/technetwork/java/javase/downloads/index.html[official
Expand All @@ -20,7 +20,7 @@ for the official word on supported versions across releases.
=====
{ls} offers architecture-specific
https://www.elastic.co/downloads/logstash[downloads] that include
Adoptium Eclipse Temurin 17, a long term support (LTS) release of the JDK.
Adoptium Eclipse Temurin 21, a long term support (LTS) release of the JDK.

Use the LS_JAVA_HOME environment variable if you want to use a JDK other than the
version that is bundled.
Expand All @@ -40,9 +40,9 @@ On systems with Java installed, this command produces output similar to the foll

[source,shell]
-----
openjdk version "17.0.12" 2024-07-16
OpenJDK Runtime Environment Temurin-17.0.12+7 (build 17.0.12+7)
OpenJDK 64-Bit Server VM Temurin-17.0.12+7 (build 17.0.12+7, mixed mode)
openjdk version "21.0.5" 2024-10-15
OpenJDK Runtime Environment Temurin-21.0.5+11 (build 21.0.5+11)
OpenJDK 64-Bit Server VM Temurin-21.0.5+11 (build 21.0.5+11, mixed mode)
-----

[float]
Expand All @@ -67,7 +67,7 @@ installation, you may get an error message, and {ls} will not start properly.
[[jdk17-upgrade]]
==== Using JDK 17

{ls} uses JDK 17 by default, but you need to update settings in `jvm.options` and
{ls} uses JDK 21 by default, but you need to update settings in `jvm.options` and
`log4j2.properties` if you are upgrading from {ls} 7.11.x (or earlier) to 7.12 or later.


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