[jdk11u-dev] RFR: 8293562: KeepAliveCache Blocks Threads while Closing Connections

[Henry]

8299602: blocked threads with KeepAliveCache.

I followed the steps that helped me carry out this pull-request.

REF/: https://mail.openjdk.org/pipermail/jdk-updates-dev/2023-February/020439.html

Thanks to @GoeLin and @jerboaa

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Commit messages:
 - Update src/java.base/share/classes/sun/net/www/http/KeepAliveCache.java
 - Update src/java.base/share/classes/sun/net/www/http/KeepAliveCache.java
 - Update src/java.base/share/classes/sun/net/www/http/KeepAliveCache.java
 - 8299602: blocked threads with KeepAliveCache.

Changes: https://git.openjdk.org/jdk11u-dev/pull/1825/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1825&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293562
  Stats: 441 lines in 3 files changed: 327 ins; 32 del; 82 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1825.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1825/head:pull/1825

PR: https://git.openjdk.org/jdk11u-dev/pull/1825