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Default JDK is now 21 #1133

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Default JDK is now 21 #1133

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@timja timja commented Jan 16, 2026

As part of progressively dropping Java 17 support and migrating all defaults to at least 21 its now time for Java 21 to be the default version.

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@timja timja requested a review from a team as a code owner January 16, 2026 22:51
@lemeurherve lemeurherve mentioned this pull request Jan 22, 2026
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