[jdk24u] RFR: 8345684: OperatingSystemMXBean.getSystemCpuLoad() throws NPE

[Fabian Meumertzheim]

Hi all,

This pull request contains a backport of commit d7ef3ac0 from the openjdk/jdk repository.

The commit being backported was authored by Fabian Meumertzheim on 9 Dec 2024 and was reviewed by David Holmes, Kevin Walls and Severin Gehwolf.

Thanks!

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Commit messages:
 - Backport d7ef3ac0b7e677c4901c69ad4361b5de8408e8d3

Changes: https://git.openjdk.org/jdk24u/pull/4/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=4&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345684
  Stats: 7 lines in 1 file changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk24u/pull/4.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/4/head:pull/4

PR: https://git.openjdk.org/jdk24u/pull/4