RFR: JDK-8303680 VirtualFlow freeze

Mon Mar 6 16:10:38 UTC 2023

Possible fix for VirtualFlow freeze.

I encountered the problem when experimenting with VirtualFlow.

Guess @johanvos should take a look.
All tests are still green, so with some luck, this doesn't break anything but fixes some known and unknown bugs.

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Commit messages:
 - JDK-8303680
 - JDK-8303680

Changes: https://git.openjdk.org/jfx/pull/1052/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1052&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303680
  Stats: 43 lines in 2 files changed: 42 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1052.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/1052/head:pull/1052

PR: https://git.openjdk.org/jfx/pull/1052