JoshRosen opened a new pull request, #43344: URL: https://github.com/apache/spark/pull/43344
### What changes were proposed in this pull request? This PR adds `--add-opens=java.base/jdk.internal.ref=ALL-UNNAMED` to our JVM flags so that we can access `jdk.internal.ref.Cleaner` in JDK 9+. ### Why are the changes needed? This allows Spark to allocate direct memory while ignoring the JVM's MaxDirectMemorySize limit. Spark uses JDK internal APIs to directly construct DirectByteBuffers while bypassing that limit, but there is a fallback path at https://github.com/apache/spark/blob/v3.5.0/common/unsafe/src/main/java/org/apache/spark/unsafe/Platform.java#L213 that is used if we cannot reflectively access the `Cleaner` API. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Added a unit test in `PlatformUtilSuite`. ### Was this patch authored or co-authored using generative AI tooling? No. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
