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Update container images to use OpenJDK 25#46386

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vmuzikar merged 1 commit intokeycloak:mainfrom
michalvavrik:feature/45830-open-jdk-25
Feb 17, 2026
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Update container images to use OpenJDK 25#46386
vmuzikar merged 1 commit intokeycloak:mainfrom
michalvavrik:feature/45830-open-jdk-25

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@michalvavrik michalvavrik commented Feb 16, 2026

This PR is mostly based on vmuzikar@303446b. Additionally, I made few tweaks to documentation and introduce a doc variable for the recommended Java version so limit required changing when migrating the recommended JDK version. I didn't change concepts-memory-and-cpu-sizing.adoc references architecture of some past experiment, so when it says OpenJDK 21, I think it is still true.

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hmm, I can see java-25-openjdk-devel.x86_64 on my Fedora, I am going to check what is the issue about.

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I think the issue is that UBI8 is used for testing

@michalvavrik michalvavrik force-pushed the feature/45830-open-jdk-25 branch 3 times, most recently from 03dceeb to d9c99a3 Compare February 16, 2026 16:24
@michalvavrik michalvavrik marked this pull request as draft February 16, 2026 16:24
@michalvavrik michalvavrik force-pushed the feature/45830-open-jdk-25 branch from d9c99a3 to 0cafd29 Compare February 16, 2026 16:29
@michalvavrik michalvavrik marked this pull request as ready for review February 16, 2026 16:29
@michalvavrik michalvavrik force-pushed the feature/45830-open-jdk-25 branch from 0cafd29 to 3a1d903 Compare February 16, 2026 16:32
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@michalvavrik Thank you for the PR.

This PR is mostly based on vmuzikar@303446b.
Additionally, I made few tweaks to documentation and introduce a doc variable for the recommended Java version so limit required changing when migrating the recommended JDK version.

* Closes: keycloak#45830

Signed-off-by: Michal Vavřík <michal.vavrik@aol.com>
@michalvavrik michalvavrik force-pushed the feature/45830-open-jdk-25 branch from 3a1d903 to c480810 Compare February 17, 2026 13:46
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michalvavrik commented Feb 17, 2026

hey @ahus1 I made small change to docs/guides/high-availability/single-cluster/concepts-threads.adoc, can you please check it's alright with you or ask someone from your team to check?

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LGTM, thank you.

@ahus1 Let me know if you have any concerns, we can resolve them as a follow-up.

@vmuzikar vmuzikar merged commit 8e816f7 into keycloak:main Feb 17, 2026
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@michalvavrik michalvavrik deleted the feature/45830-open-jdk-25 branch February 17, 2026 14:40
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Update container images to use OpenJDK 25

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