The HotSpot runtime code as well as the core libraries code in the JDK has been updated in order to detect a cgroup v2 host system when running OpenJDK within a Linux container.

Since the 8u202 release of OpenJDK, the container detection code recognized cgroup v1 (legacy) host Linux systems. With 8u372 and later releases, both versions of the underlying cgroups pseudo filesystem will be detected and corresponding container limits applied to the OpenJDK runtime.

Without this enhancement, OpenJDK would not apply container resource limits when running on a cgroup v2 Linux host system, but would use the underlying hosts' resource limits instead.