The following test times out in the JDK 14 CI on Win*:

runtime/modules/ModuleStress/ModuleStressGC.java

Here's a snippet from the log file:

#section:main
----------messages:(7/329)----------
command: main ModuleStressGC
reason: User specified action: run main/othervm ModuleStressGC
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): 2584.18
----------configuration:(4/115)----------
Boot Layer
  add modules: java.base
  add exports: java.base/jdk.internal.misc ALL-UNNAMED

----------System.out:(5/1399)*----------
Command line: [c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+11-367\\windows-x64-debug.jdk\\jdk-14\\fastdebug\\bin\\java.exe -cp T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_runtime\\classes\\3\\runtime\\modules\\ModuleStress\\ModuleStressGC.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+11-367\\src.full\\open\\test\\hotspot\\jtreg\\runtime\\modules\\ModuleStress;T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_runtime\\classes\\3\\test\\lib;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+11-367\\src.full\\open\\test\\lib;C:\\ade\\mesos\\work_dir\\jib-master\\install\\java\\re\\jtreg\\4.2\\promoted\\all\\b14\\bundles\\jtreg_bin-4.2.zip\\jtreg\\lib\\javatest.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\java\\re\\jtreg\\4.2\\promoted\\all\\b14\\bundles\\jtreg_bin-4.2.zip\\jtreg\\lib\\jtreg.jar -Xlog:module=trace -p T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_runtime\\classes\\3\\runtime\\modules\\ModuleStress\\ModuleStressGC.d\\mods -m jdk.test/test.MainGC ]
[2019-08-22T03:15:05.429104700Z] Gathering output for process 4516
Timeout refired 1200 times
[2236.952s][error][attach] failure (109) writing result of operation jcmd to pipe \\\\.\\pipe\\javatool1223258779
[2533.819s][error][attach] failure (109) writing result of operation threaddump to pipe \\\\.\\pipe\\javatool1442446254
----------System.err:(0/0)----------
----------rerun:(49/5593)*----------

So the test timed out at 2584.18 seconds == 43 minutes.
That's a bit much especially for an OCI Win* machine.

The "[error][attach]" failures shown above happened at
about the 43 minute mark so I think those mesgs are
from the artifact gathering part of JTREG.