[jdk8u-dev] RFR: 8293562: KeepAliveCache Blocks Threads while Closing Connections [v4]

[Dhamoder Nalla]

> Issue: [JDK-8293562](https://bugs.openjdk.org/browse/JDK-8293562): KeepAliveCache Blocks Threads while Closing Connections
> Backport of PR https://github.com/openjdk/jdk11u-dev/pull/1890 fromJDK11 to JDK8.
> 
> The JDK11 patch doesn't apply cleanly 3/11 hunks need to be ported manually in KeepAliveCache.java.
> 
> Test performed:
> 
> 1. JTreg jdk_tier1
> 2. JTreg jdk_tier2
> 3. New test case added to this PR passed with the fix and failed without it.
> 4. The customer failure scenario has been validated.

Dhamoder Nalla has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 11 commits:

 - Merge master
 - Merge branch 'pr/453' of https://git.openjdk.org/jdk8u-dev into Backport-JDK-8293562
 - 8291226: Create Test Cases to cover scenarios for JDK-8278067
   
   Backport-of: 86ec158dfb7a770fe9a74ff8617bac938d0bb90f
 - Merge branch 'master' into Backport-JDK-8278067
 - Remove SystemProperty tag as it is not supported in JDK8
 - Merge pr/437
 - Fix indentation
 - Backport d8f44aa39e921594505864e6270f42b745265293
 - Fix indentation
 - Backport 770c1f65c588f3156f9b70097df752d8059c1038
 - ... and 1 more: https://git.openjdk.org/jdk8u-dev/compare/d0d9a152...36cb9124

-------------

Changes: https://git.openjdk.org/jdk8u-dev/pull/409/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=409&range=03
  Stats: 347 lines in 3 files changed: 276 ins; 7 del; 64 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/409.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/409/head:pull/409

PR: https://git.openjdk.org/jdk8u-dev/pull/409