The following test failed in the JDK21 CI:

vmTestbase/gc/gctests/SoftReference/SoftReferenceTest/SoftReferenceTest.java

Here's a snippet from the log file:

#section:main
----------messages:(6/359)----------
command: main gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest -stressTime 600
reason: User specified action: run main/othervm gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest -stressTime 600
started: Fri May 12 05:49:24 UTC 2023
Mode: othervm [/othervm specified]
finished: Fri May 12 05:49:28 UTC 2023
elapsed time (seconds): 3.594
----------configuration:(0/0)----------
----------System.out:(23/1160)----------
Stress time: 600 seconds
Stress iterations factor: 1
Stress threads factor: 1
Stress runs factor: 1
Max memory: 2040528896
Sleep time: 500
Iterations: 0
Number of threads: 16
Run GC thread: false
Run mem diag thread: false
Run forever: false
For random generator using seed: 3219044760223124900
To re-run test with same seed value please add "-Djdk.test.lib.random.seed=3219044760223124900" to command line.
nsk.share.TestFailure: 4266 out of 320130 SoftReferences was not null at time of OutOfMemoryError
at gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest.run(SoftReferenceTest.java:134)
at nsk.share.test.Tests$TestRunner.execute(Tests.java:82)
at nsk.share.test.Tests$TestRunner.run(Tests.java:96)
at nsk.share.gc.GC.runTest(GC.java:114)
at gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest.main(SoftReferenceTest.java:147)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1583)
----------System.err:(14/800)----------
nsk.share.TestFailure: Test exit code: 97
at nsk.share.test.Tests$TestRunner.execute(Tests.java:90)
at nsk.share.test.Tests$TestRunner.run(Tests.java:96)
at nsk.share.gc.GC.runTest(GC.java:114)
at gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest.main(SoftReferenceTest.java:147)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1583)

JavaTest Message: Test threw exception: nsk.share.TestFailure: Test exit code: 97
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: nsk.share.TestFailure: Test exit code: 97
----------rerun:(37/8800)*----------