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

[PoojaDP-23]

fix: https://bugs.openjdk.org/browse/JDK-8293562

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Commit messages:
 - address  whitespace error
 - Address indentation
 - Backport 454ef9ba2b2b15250a29251556f79a0464df5ccc

Changes: https://git.openjdk.org/jdk11u-dev/pull/1890/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1890&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293562
  Stats: 351 lines in 3 files changed: 288 ins; 17 del; 46 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1890.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1890/head:pull/1890

PR: https://git.openjdk.org/jdk11u-dev/pull/1890