RFR: 8364352: Some tests fail when using a limited number of pregenerated .jsa CDS archives

[Matthias Baesken]

On Wed, 20 Aug 2025 13:13:19 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Okay ... so what configuration does classes.jsa represent? I'm struggling to understand exactly which archive these tests need, or whether they should be able to work with any of the 4 variants. ??
>
> Afaik those are the 4 archives you find usually on Linux in the JVM image ; classes.jsa represents the compressed oops but no compressed object headers config .
> 
> ./lib/server/classes_nocoops.jsa     -    no compressed oops
> ./lib/server/classes.jsa                     -   compressed oops
> ./lib/server/classes_coh.jsa             -    compressed object headers, compressed oops 
> ./lib/server/classes_nocoops_coh.jsa   -   compressed object headers, no compressed oops

Probably the requires vm.cds.default.archive.available  is from times with less jsa files then we usually have today . We could of course introduce 4 requires for all the different  jsa's we potentially have these days but I am not sure if it is really needed,

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PR Review Comment: https://git.openjdk.org/jdk/pull/26820#discussion_r2288140399