RFR: 8359174: tools/jlink/JLink20000Packages.java timed out [v4]

[Eirik Bjørsnøs]

On Fri, 27 Jun 2025 04:59:58 GMT, Henry Jen <henryjen at openjdk.org> wrote:

>> Create a jar directly from the memory instead of real file, this should reduce the I/O overhead which likely the reason for the time out.
>> The issue is not reproducible locally, and fails intermittently, so we simply trying to reduce time needed.
>> The jar file created is verified manually running jtreg with retain=all.
>
> Henry Jen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adapt review feedbacks

test/jdk/tools/jlink/JLink20000Packages.java line 62:

> 60:  *          jdk.compiler
> 61:  * @build tests.*
> 62:  * @run main/othervm -Xmx1g -Xlog:init=debug -XX:+UnlockDiagnosticVMOptions -XX:+BytecodeVerificationLocal JLink20000Packages

I suspect the `-Xmx1g` was added to make `javac` happy compiling 20 000 classes. If that's the case, we could remove this.

I ran with a max heap of 100M, and the test ran just fine. I think this test is no longer very demanding of heap.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25981#discussion_r2170917716