RFR: 8346998: Test nsk/jvmti/ResourceExhausted/resexhausted003 fails with java.lang.OutOfMemoryError when CDS is off

[Leonid Mesnik]

On Tue, 7 Jan 2025 04:19:05 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Test nsk/jvmti/ResourceExhausted/resexhausted003  limits metaspace size. 9m is not enough if sharing classes are disabled.
>> It starts failing with -XX:+UseCompactObjectHeaders just because CDS archives are no built  this mode.  Never executed with CDS off before.
>> 
>> Verified that it pass now with CDS off with and without UseCompactObjectHeaders.
>> 
>> I removed also other heap limits just because they are not needed and only might confuse test readers.
>
> test/hotspot/jtreg/vmTestbase/nsk/jvmti/ResourceExhausted/resexhausted003/TestDescription.java line 43:
> 
>> 41:  *      -agentlib:resexhausted=-waittime=5
>> 42:  *      -Xms64m
>> 43:  *      -Xmx64m
> 
> Don't you need these to ensure we get OOME in a reasonable amount of time on systems with huge memories?

The test trigger OOME in Metaspace only by loading classes, so heap shouldn't be used.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22936#discussion_r1904900729