[jdk11u-dev] RFR: 8275843: Random crashes while the UI code is executed [v2]

[Sergey Bylokhov]

> Hi all,
> 
> This pull request contains a backport of commit [a9c1acbb](https://github.com/openjdk/jdk/commit/a9c1acbb8aec46e4a488b7c77bb6318af87747f6) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Sergey Bylokhov on 14 Dec 2021 and was reviewed by Alexander Zvegintsev.
> 
> 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 three additional commits since the last revision:

 - Merge branch 'openjdk:master' into mrserb-backport-a9c1acbb
 - Merge branch 'openjdk:master' into mrserb-backport-a9c1acbb
 - Backport a9c1acbb8aec46e4a488b7c77bb6318af87747f6

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2122/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2122/files/77bdef61..fe7358d0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2122&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2122&range=00-01

  Stats: 270963 lines in 3623 files changed: 116125 ins; 126940 del; 27898 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2122.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2122/head:pull/2122

PR: https://git.openjdk.org/jdk11u-dev/pull/2122