[jdk17u-dev] RFR: 8270869: G1ServiceThread may not terminate

[Goetz Lindenmaier]

I backport this for parity with 17.0.8-oracle.

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Commit messages:
 - Backport 7f35e5bac9925c06985f16d225f5dd9c50157d06

Changes: https://git.openjdk.org/jdk17u-dev/pull/1250/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1250&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8270869
  Stats: 5 lines in 1 file changed: 1 ins; 3 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1250.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1250/head:pull/1250

PR: https://git.openjdk.org/jdk17u-dev/pull/1250