[jdk11u-dev] RFR: 8280041: Retry loop issues in java.io.ClassCache [v3]

[Roman Kennke]

> This backports the fix for JDK-8280041, which fixes a number of small issues with the preceding change for JDK-8277072.
> The original change has baked for several weeks in jdk19 and applies cleanly.
> 
> Testing:
>  - [x] tier1
>  - [ ] tier2
>  - [ ] tier3

Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:

  Adjust test for missing Reference.refersTo() API

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/887/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/887/files/07ca7b9d..fdd0c9af

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=887&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=887&range=01-02

  Stats: 7 lines in 1 file changed: 2 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/887.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/887/head:pull/887

PR: https://git.openjdk.java.net/jdk11u-dev/pull/887