Illegal Reflective Access in Hotspot.scala

[ryanb93]

The following warning is produced when run in a JRE > 9.

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.twitter.jvm.Hotspot (file:/hcom/servers/pros/pros.jar) to field sun.management.ManagementFactoryHelper.jvm
WARNING: Please consider reporting this to the maintainers of com.twitter.jvm.Hotspot
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

util/util-jvm/src/main/scala/com/twitter/jvm/Hotspot.scala

Line 38 in 6f587b3

Class.forName("sun.management.ManagementFactoryHelper").getDeclaredField("jvm")

[kevinoliver]

Thanks. I believe we don't officially support JDK 9+ yet. I think our next version will be JDK 11 which is an LTS release. We have not begun this effort.

[luciferous]

We'll be forced to tackle this issue when we target JDK 11.

[hartmut27]

side note: as a work-around - to suppress the warnings in the log, comatible with OpenJDK 14 JVM: Gist