[jdk17u-dev] RFR: 8297149: REDO JDK-8296889: Race condition when cancelling a request [v3]

[Goetz Lindenmaier]

> I backport this for parity with 17.0.17-oracle.

Goetz Lindenmaier has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge branch 'master' into goetz_backport_8297149
 - Backport 134acab5a40b3f927ff6343aa49477a490e410b5
 - Work around missing executor.close()
 - Parts of 8295944
 - Backport dcd46501e6a25ac875d61bfbd412555b933ce34c

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Changes: https://git.openjdk.org/jdk17u-dev/pull/3670/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3670&range=02
  Stats: 44 lines in 5 files changed: 31 ins; 6 del; 7 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3670.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3670/head:pull/3670

PR: https://git.openjdk.org/jdk17u-dev/pull/3670