The following test timed out in the JDK19 CI:

vmTestbase/gc/g1/unloading/tests/unloading_humongous_class_keep_class/TestDescription.java

Here's a snippet from the log file:

#section:main
----------messages:(7/802)----------
command: main -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent -Xlog:gc:gc.log -XX:-UseGCOverheadLimit gc.g1.unloading.UnloadingTest -humongousClass -keep class -numberOfChecksLimit 4 -stressTime 180
reason: User specified action: run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent -Xlog:gc:gc.log -XX:-UseGCOverheadLimit gc.g1.unloading.UnloadingTest -humongousClass -keep class -numberOfChecksLimit 4 -stressTime 180
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.base --add-exports java.base/jdk.internal.misc=ALL-UNNAMED
Timeout information:
--- Timeout information end.
elapsed time (seconds): 3489.134
----------configuration:(4/115)----------
Boot Layer
  add modules: java.base
  add exports: java.base/jdk.internal.misc ALL-UNNAMED

----------System.out:(159/8787)----------
Timeout refired 480 times
Stress time: 720 seconds
Stress iterations factor: 1
Stress threads factor: 1
Stress runs factor: 1
Max memory: 2136997888
Sleep time: 500
Iterations: 0
Number of threads: 24
Run GC thread: false
Run mem diag thread: false
Run forever: false
releaseRefMode = NONE
whatToKeep = CLASS
classlodingMethod = REFLECTION
numberOfGCsBeforeCheck = 50
keepRefMode = STRONG_REFERENCE
humongousClass = false
compilationLevel = 0
compilationNumber = 2
redefineClasses = false
inMemoryCompilation = false
numberOfChecksLimit = 4
For random generator using seed: 139317252182718668
To re-run test with same seed value please add "-Djdk.test.lib.random.seed=139317252182718668" to command line.
In method of generated class. Random.nextDouble = 0.7275636800328681
 Printing bytesToReplace0 bytesToReplace2

<snip>

In method of generated class. Random.nextDouble = 0.7275636800328681
 Printing bytesToReplace0 bytesToReplace2
 Check OK, class gc.g1.unloading.loading.ClassAbc_8___________, isAlive = true, shouldBeAlive = true
Exiting because numberOfChecksLimit exceeded.
ClassAssertion.getCounterOfCheckedAlive() = 4
ClassAssertion.getCounterOfCheckedUnloaded() = 5
bean.getName() = "G1 Young Generation", bean.getCollectionCount() = 60
bean.getName() = "G1 Old Generation", bean.getCollectionCount() = 0
----------System.err:(1/16)----------
STATUS:Passed.
----------rerun:(49/7372)*----------

<snip>

result: Error. Program `c:\ade\mesos\work_dir\jib-master\install\jdk-19+11-598\windows-x64-debug.jdk\jdk-19\fastdebug\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 3450386ms).


Please note that the test PASSED while the timeout handler
was running.