javaOpenRefine/OpenRefine #7788Not a task: not reproduced

Update minimum Java requirement to Java 21 LTS

envgap__OpenRefine__OpenRefine-7788

Original GitHub issue ↗Dated source checkout ↗Opened 2026-05-15

01 / FAILURE SIGNATURE

As reported upstream

No identifying execution failure has been captured.

Not a benchmark task.

In a clean container the reported failure did not reproduce, or the known fix did not make the project run.

02 / ENVIRONMENT RECIPE

Base commit: 83464d0532f713b33e776f61176e8a25df2167d6
Manifest: pom.xml
Reproduce: Awaiting issue-specific recipe
Run under trace: Awaiting a meaningful runtime command

03 / ORIGINAL ISSUE TEXT

OpenRefine/OpenRefine #7788 · read the original issue

In January we updated from Java 11 to Java 17, but Java 17 was already EOL then for those without commercial support and "Premier" support will be ending in 4 months. In keeping with our [policy](https://github.com/OpenRefine/OpenRefine/issues/7281#issuecomment-3444275355) of supporting the earliest non-EOL LTS release, it's time for us to upgrade to Java 21. Java 21 is also required for Jena 6 (#7787)

Current LTS releases are:

Java 25 - released September 2025
Java 21 - released September 2023 

### Proposed solution
Update to Java 21 as our minimum version immediately. Add Java 26 (non-LTS release from 2 months ago) to our test matrix

### Alternatives considered
Stick with Java 17, but that goes against our established policy and blocks Jena 6.

Continue on GitHub ↗

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