[jdk21u-dev] RFR: 8327461: KeyStore getEntry is not thread-safe

[Goetz Lindenmaier]

I would like to fix this issue in 21.

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Commit messages:
 - Backport ffd43c922e3b8b75a00e494d5484b6a487dd5c90

Changes: https://git.openjdk.org/jdk21u-dev/pull/1684/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1684&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327461
  Stats: 213 lines in 2 files changed: 175 ins; 11 del; 27 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1684.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1684/head:pull/1684

PR: https://git.openjdk.org/jdk21u-dev/pull/1684