On Sun, 10 Jan 2021 23:30:58 GMT, Peter Levart <plev...@openjdk.org> wrote:

>>> How frequent are situations where the two classloaders are unrelated?
>> 
>> I think they'd be extremely unlikely. The only user of these right now is 
>> Dynalink's type converter factory. I _can imagine_ a situation where there's 
>> a conversion from a dynamic language runtime's internal "object" type to an 
>> application-specific Java interface, or from its internal "function object" 
>> type to an app-specific Java SAM type, and for some reason the app-specific 
>> types aren't in the same or descendant class loader of the language 
>> runtime's loader.
>> Frankly, I'd expect 99.99% of the time, app classes would be in the 
>> same-or-descendant class loader relative to the dynamic language runtime 
>> types. It'd have to be a really exotic setup for this not to be the case, 
>> but I'd rather not second guess the users and provide a reasonable 
>> functionality even in this case. 
>> If you're thinking of rather throwing an exception when they're unrelated… 
>> well, we could certainly do that but I give it a mean time of six months 
>> before somebody runs into it and asks about it on Stack Overflow.
>
> Well, I was just thinking if it might be more frequent and would benefit from 
> caching the result too. But if it is not, then what you have now is OK.

@plevart would you be then be okay with approving this PR? Also, @hns or 
@sundararajana can I maybe get a review from either of you?

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PR: https://git.openjdk.java.net/jdk/pull/1918

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