RFR: 8277072: ObjectStreamClass caches keep ClassLoaders alive [v2]

[Peter Levart]

On Mon, 29 Nov 2021 13:47:19 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> I don't quite understand this: If the Class object is still reachable by the app,
1. a weak reference would not get cleared and 
2. the Class's ClassLoader would not get unloaded.

...but the ObjectStreamClass instance could still get GC-ed, because it is held in the map using WeakReference<ObjectStreamClass>. The fact that associated Class is still reachable does not mean that the ObjectStreamClass instance is!

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PR: https://git.openjdk.java.net/jdk/pull/6375