RFR: 8327180: Failed: java/io/ObjectStreamClass/ObjectStreamClassCaching.java#G1 [v3]

[Roger Riggs]

> The intermittent failure of ObjectStreamClassCaching is due to an incorrect assumption about GC behavior and a race condition.
> 
> Removed test based on incorrect assumptions about simultaneous clearing of WeakReferences.
> Added a run of the test using ZGC, (previously omitted)

Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:

  Use the correct ZGenerational collector

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18284/files
  - new: https://git.openjdk.org/jdk/pull/18284/files/b94fe6d5..55960c41

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18284&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18284&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18284.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18284/head:pull/18284

PR: https://git.openjdk.org/jdk/pull/18284