applications/jcstress/copy.java fails due to timeouts

The following test failed in the JDK14 CI:

applications/jcstress/copy.java

Here's a snippet from the log file:

----- [OK] Unlocking diagnostic VM options
Burning up to figure out the exact CPU count....... done!

----- [OK] Trimming down the default VM heap size to 1/8-th of max RAM
----- [OK] Trimming down the number of compiler threads
----- [OK] Trimming down the number of parallel GC threads
----- [OK] Trimming down the number of concurrent GC threads
----- [OK] Trimming down the number of G1 concurrent refinement GC threads
----- [FAILED] Testing @Contended works on all results and infra objects
Java HotSpot(TM) 64-Bit Server VM warning: Option MaxRAMFraction was deprecated in version 10.0 and will likely be removed in a future release.
Java HotSpot(TM) 64-Bit Server VM warning: Option MinRAMFraction was deprecated in version 10.0 and will likely be removed in a future release.
Exception in thread "main" java.lang.IllegalStateException: /opt/mach5/mesos/work_dir/slaves/00f4d7f9-7805-4b6a-aef8-9bb130db2435-S665/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5854f253-a5ba-4327-9251-b4dea16dc32a/runs/9697ffb5-5151-48bf-a470-a93f69ad2616/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/classes/1/applications/jcstress/copy/d/applications/jcstress/JcstressRunner
at org.openjdk.jcstress.util.Reflections.getClasses(Reflections.java:66)
at org.openjdk.jcstress.vm.ContendedTestMain.main(ContendedTestMain.java:43)
Caused by: java.lang.ClassNotFoundException: /opt/mach5/mesos/work_dir/slaves/00f4d7f9-7805-4b6a-aef8-9bb130db2435-S665/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5854f253-a5ba-4327-9251-b4dea16dc32a/runs/9697ffb5-5151-48bf-a470-a93f69ad2616/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/classes/1/applications/jcstress/copy/d/applications/jcstress/JcstressRunner
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:416)
at org.openjdk.jcstress.util.Reflections.getClasses(Reflections.java:64)
... 1 more

----- [OK] Unlocking Whitebox API for online de-optimization
----- [OK] Testing allocation profiling
----- [OK] Trying Thread.onSpinWait


Since the failing subtest is "Testing @Contended works on all results
and infra objects" and there is a ClassNotFoundException exception,
I'm starting this bug off in hotspot/runtime.