sun.misc.Unsafe::arrayBaseOffset has been called by com.lmax.disruptor.RingBufferFields

[kelunik]

Describe the bug

Running on Java 25 yields the following warning:

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::arrayBaseOffset has been called by com.lmax.disruptor.RingBufferFields (file:/app/agents/elastic-apm-agent.jar)
WARNING: Please consider reporting this to the maintainers of class com.lmax.disruptor.RingBufferFields
WARNING: sun.misc.Unsafe::arrayBaseOffset will be removed in a future release

Steps to reproduce

Start application with Elastic APM Agent attached on Java 25.

Expected behavior

No warning.

[kelunik]

See also: LMAX-Exchange/disruptor#502

[jackshirazi]

For the immediate request, you can turn off warnings with --sun-misc-unsafe-memory-access=allow

For the longer term support, if the used unsafe feature is removed, we would need disruptor 4, which means we would need to bump the minimum supported version to java 11. This would need to be as a separate artefact (since we haven't deprecated java 8). That's doable but a chunk of work so won't be prioritized for now. When the unsafe feature is actively removed, we should revisit this issue

[kelunik]

Of course, I can disable all warnings, but that will also hide other warnings if there are other problematic JARs.

Here's the full plan and it seems likely JDK 26 will throw by default: https://openjdk.org/jeps/471