kaivalnp opened a new pull request, #14843:
URL: https://github.com/apache/lucene/pull/14843
### Description
Backport #14178 to 10.x
### Summary of changes
- Support for JDK21 via MR-JAR and runtime lookup (similar to other
Panama-based classes
[here](https://github.com/apache/lucene/tree/f93a0ed318b528229dee91dbbca98cb6607b24ae/lucene/core/src/java21/org/apache/lucene/internal/vectorization)).
This was tricky because some functions were renamed from JDK21
(https://openjdk.org/jeps/442) -> JDK22 (https://openjdk.org/jeps/454, where it
was finalized) -- I'm using method handles to bind to the correct function at
runtime
- Allow native access to the `libfaiss_c.so` shared library from tests,
enforced by the security manager
- Change GH action to run on JDK21
- Misc changes for the lower Java language level + 10.x branch
I also ran the Faiss tests offline with JDK 21, 22, 23, 24 using:
```sh
gradlew -p lucene/sandbox -Dtests.faiss.run=true test --tests
"org.apache.lucene.sandbox.codecs.faiss.*"
```
..and they all passed!
### Diff of relevant files
https://gist.github.com/kaivalnp/77fb274ebd3de22c500396e80bb5df3c
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