[jdk17] RFR: 8269543: The warning for System::setSecurityManager should only appear once for each caller

[Chapman Flack]

On 06/29/21 15:39, Weijun Wang wrote:

> If I switch to a "non-weak" set or map, then it seems I can safely use
> the source string as the key. Will using the Class object as a key prevent
> them from unloading?

I understand that it's in principle possible for classes to get GC'd,
though I don't know how often it happens in typical practical settings.

This seems like a question to be approached from the angle of asking
what the wanted semantics should be. What should be the effect on warning
messages if class a.b.C is loaded and sets a security manager, and is later
GC'd, and then a class also named a.b.C is later loaded, and sets a security
manager?

It seems like a preferred answer to that question would determine
whether to make the set weak or not.

Regards,
-Chap