[jdk21u-dev] RFR: 8299813: java/nio/channels/DatagramChannel/Disconnect.java fails with jtreg test timeout due to lost datagram

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport 49eb00da8dc66cff3ca430f06ab21357ee6180ef

Changes: https://git.openjdk.org/jdk21u-dev/pull/919/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=919&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299813
  Stats: 32 lines in 1 file changed: 19 ins; 0 del; 13 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/919.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/919/head:pull/919

PR: https://git.openjdk.org/jdk21u-dev/pull/919