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race test MonoReduceSeedTest> onNextAndCancelRace| MonoReduceTest > onNextAndCancelRace fails randomly on idk 21 and VirtualThread #3629

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OlegDokuka opened this issue Nov 2, 2023 · 0 comments · Fixed by #3678
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race test MonoReduceSeedTest> onNextAndCancelRace| MonoReduceTest > onNextAndCancelRace fails randomly on idk 21 and VirtualThread #3629

OlegDokuka opened this issue Nov 2, 2023 · 0 comments · Fixed by #3678
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type/bug A general bug type/test/flaky

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@OlegDokuka
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MonoReduceSeedTest > onNextAndCancelRace() FAILED
    java.lang.AssertionError: RaceTestUtils.race wait timed out after 5s
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:180)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:144)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:108)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:120)
        at reactor.core.publisher.MonoReduceSeedTest.onNextAndCancelRace(MonoReduceSeedTest.java:180)
Test class reactor.core.publisher.MonoReduceTest

MonoReduceTest > onNextAndCancelRace() FAILED
    java.lang.AssertionError: RaceTestUtils.race wait timed out after 5s
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:180)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:144)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:108)
        at reactor.test.util.RaceTestUtils.race(RaceTestUtils.java:120)
        at reactor.core.publisher.MonoReduceTest.onNextAndCancelRace(MonoReduceTest.java:212)
@OlegDokuka OlegDokuka added the type/bug A general bug label Nov 2, 2023
@chemicL chemicL mentioned this issue Jan 5, 2024
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chemicL added a commit that referenced this issue Jan 5, 2024
@chemicL
Improve RaceTestUtils to yield when CPUs don't suffice (#3678)
292b21b 
When `RaceTestUtils`-based concurrency tests involving more tasks than
available CPUs were run, they'd time-out when run in the Java 21 setup
with loom-based boundedElastic `Scheduler`. This change should eliminate
such situations.

Addresses related issues below and potentially more.
Fixes #3629
Fixes #3628
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Improve RaceTestUtils to yield when CPUs don't suffice reactor/reactor-core
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@OlegDokuka