Server on Java 23 and above crash with spark enabled

[NogradThGin]

Is there an existing issue for this?

• I have searched the existing issues

What behaviour is observed?

The server crash when using a java version above 22. GraalVM, Azul or classical Java.

Crash occurs when a player join the server with spark background profiler enabled.
You can generate the map with Chunky (did it for 16 mins) as long no player is on the server.

Expected behaviour

No crash when running the server with players.

Actually the argument « -DPurpur.IReallyDontWantSpark=true » doesn't disable Spark.

To Reproduce

Download a 23 or 24 java version.
Start the server.
Join the server.

Plugin list

Spark (enabled)
bStats (disabled)
Chunky
Pl3xmap
Minecraft Prometheus Exporter

Leaf Version

1.21.1

Error log (if applicable)

https://mclo.gs/10IuH0r

Configuration

https://mclo.gs/2oE919l

[HaHaWTH]

Is it reproducible on Purpur?
btw you can disable bundled spark here: https://docs.papermc.io/paper/reference/global-configuration#spark_enabled

[NogradThGin]

Yes same behavior on Purpur (java 24 GraalVM EA)

[Dreeam-qwq]

Spark uses async-profiler for profilering on linux machine. And this crash is a async-profiler issue, referring to related issue async-profiler/async-profiler#923, which is already fixed in async-profiler v3.0+. However, Spark uses async-profiler v2.8.3 for now. There is an existing WIP pr in spark for upgrading async-profiler to 3.0, see lucko/spark#386, but according to lucko's comment, it may not be done very soon.

You can try to disable bundled spark by disabling it in paper config (like @HaHaWTH mentioned above), or switch to Java 21 or 22.

[NogradThGin]

OK thanks for the update and explanations!
I close the issue as it's not related to Leaf.