[jdk17u-dev] RFR: 8276819: javax/print/PrintServiceLookup/FlushCustomClassLoader.java fails to free [v3]

[Sergey Bylokhov]

> Hi all,
> 
> This pull request contains a backport of commit [7c2c5858](https://github.com/openjdk/jdk/commit/7c2c58587d4eda5523331eae45e7d897252dc097) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Sergey Bylokhov on 12 Dec 2021 and was reviewed by Prasanta Sadhukhan and Alexey Ivanov.
> 
> Thanks!

Sergey Bylokhov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into JDK-8276819
 - Backport 7c2c58587d4eda5523331eae45e7d897252dc097
 - Merge branch 'openjdk:master' into mrserb-backport-68756782
 - Backport 687567822a5380fb7d8c5b54ae548b2a5c848187

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1706/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1706/files/c925665e..9761395e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1706&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1706&range=01-02

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1706.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1706/head:pull/1706

PR: https://git.openjdk.org/jdk17u-dev/pull/1706