The following test times out in the JDK21 CI:

com/sun/jdi/ThreadMemoryLeakTest.java

Here's a snippet from the log file:

----------System.err:(20/1009)----------
[3ms] run args: [ThreadMemoryLeakTarg]
[1533ms] Got ThreadStartEvent #1000 threads:308
[1882ms] Got ThreadDeathEvent #1000 threads:260
[2483ms] Got ThreadStartEvent #2000 threads:388
[2855ms] Got ThreadDeathEvent #2000 threads:409
[3598ms] Got ThreadStartEvent #3000 threads:184
[3763ms] Got ThreadDeathEvent #3000 threads:305
[4569ms] Got ThreadStartEvent #4000 threads:443
[4879ms] Got ThreadDeathEvent #4000 threads:389
[5526ms] Got ThreadStartEvent #5000 threads:400
[5683ms] Got ThreadDeathEvent #5000 threads:264
[6717ms] Got ThreadStartEvent #6000 threads:330

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Thread-1"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "output reader"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "JDI Target VM Interface"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "process reaper (pid 49716)"
----------rerun:(39/6062)*----------

<snip>

result: Error. Program `/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-21+15-1199/macosx-x64-debug.jdk/jdk-21/fastdebug/bin/java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 1196969ms).