The following test failed in the JDK15 CI:

applications/kitchensink/Kitchensink24HStress.java

Here's a snippet from the task's stdout log:

[2020-03-16T03:44:25,815Z] [stress.process.out] #
[2020-03-16T03:44:25,815Z] [stress.process.out] # A fatal error has been detected by the Java Runtime Environment:
[2020-03-16T03:44:25,815Z] [stress.process.out] #
[2020-03-16T03:44:25,815Z] [stress.process.out] # Internal Error (t:\workspace\open\src\hotspot\share\jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp:122), pid=14260, tid=12264
[2020-03-16T03:44:25,815Z] [stress.process.out] # assert((((((klass)->trace_id()) & ((JfrTraceIdEpoch::method_and_class_in_use_this_epoch_bits()))) != 0))) failed: invariant
[2020-03-16T03:44:25,815Z] [stress.process.out] #
[2020-03-16T03:44:25,815Z] [stress.process.out] # JRE version: Java(TM) SE Runtime Environment (15.0+15) (fastdebug build 15-ea+15-590)
[2020-03-16T03:44:25,815Z] [stress.process.out] # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-ea+15-590, mixed mode, tiered, g1 gc, windows-amd64)
[2020-03-16T03:44:25,815Z] [stress.process.out] # Core dump will be written. Default location: T:\testoutput\test-support\jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink24HStress_java\scratch\0\hs_err_pid14260.mdmp
[2020-03-16T03:44:25,815Z] [stress.process.out] #
[2020-03-16T03:44:25,815Z] [stress.process.out] Unsupported internal testing APIs have been used.
[2020-03-16T03:44:25,815Z] [stress.process.out]
[2020-03-16T03:44:25,815Z] [stress.process.out] # An error report file with more information is saved as:
[2020-03-16T03:44:25,815Z] [stress.process.out] # T:\testoutput\test-support\jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink24HStress_java\scratch\0\hs_err_pid14260.log
[2020-03-16T03:44:25,815Z] [2020-03-16T03:33:27.723501100Z] Gathering output for process 35680
[2020-03-16T03:44:25,815Z] [stress.process.out] #
[2020-03-16T03:44:25,815Z] [stress.process.out] # If you would like to submit a bug report, please visit:
[2020-03-16T03:44:25,815Z] [stress.process.out] # https://bugreport.java.com/bugreport/crash.jsp
[2020-03-16T03:44:25,815Z] [stress.process.out] #