[jdk21] RFR: 8304885: Reuse stale data to improve DNS resolver resiliency

Wed Jun 21 22:48:16 UTC 2023

Hi all,

This pull request contains a backport of commit [bdd81b31](https://github.com/openjdk/jdk/commit/bdd81b31825a9eb6a0f0883fca56a011ac2aebf8) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Sergey Bylokhov on 9 Jun 2023 and was reviewed by Michael McMahon and Daniel Fuchs.

CSR is approved for JDK 21: https://bugs.openjdk.org/browse/JDK-8306653
"jdk21-enhancement-yes" label is added to the JBS.

Thanks!

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Commit messages:
 - Backport bdd81b31825a9eb6a0f0883fca56a011ac2aebf8

Changes: https://git.openjdk.org/jdk21/pull/53/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=53&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304885
  Stats: 516 lines in 16 files changed: 429 ins; 55 del; 32 mod
  Patch: https://git.openjdk.org/jdk21/pull/53.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/53/head:pull/53

PR: https://git.openjdk.org/jdk21/pull/53