The following test failed in the JDK17 CI:

applications/kitchensink/Kitchensink.java

Here's a snippet from the log file:

[2020-12-22T23:33:47.721888906Z] Gathering output for process 5377
[2020-12-22T23:33:53.925015297Z] Waiting for completion for process 5377
[2020-12-22T23:33:53.925332265Z] Waiting for completion finished for process 5377
Output and diagnostic info for process 5377 was saved into 'pid-5377-output.log'
[stress.process.out] [thread 3297 also had an error]#
[stress.process.out]
[stress.process.out] # A fatal error has been detected by the Java Runtime Environment:
[stress.process.out] #
[stress.process.out] # SIGILL (0x4) at pc=0x00007f4a51802844, pid=23400, tid=23442
[stress.process.out] #
[stress.process.out] # JRE version: Java(TM) SE Runtime Environment (17.0+3) (fastdebug build 17-ea+3-LTS-117)
[stress.process.out] # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 17-ea+3-LTS-117, mixed mode, sharing, tiered, compressed oops, serial gc, linux-amd64)
[stress.process.out] # Problematic frame:
[stress.process.out] # C[thread 23445 also had an error]
[stress.process.out] [thread 23448 also had an error]
[stress.process.out] 0x00007f4a51802844
[stress.process.out] #
[stress.process.out] # Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S14885/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/e869987a-c9bd-443f-985c-b1b2f9559913/runs/25613e6d-a114-457f-887b-99f203e920ce/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/core.23400)
[stress.process.out] #
[stress.process.out] Unsupported internal testing APIs have been used.
[stress.process.out]
[stress.process.out] [thread 3296 also had an error]
[stress.process.out] # An error report file with more information is saved as:
[stress.process.out] # /opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S14885/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/e869987a-c9bd-443f-985c-b1b2f9559913/runs/25613e6d-a114-457f-887b-99f203e920ce/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/hs_err_pid23400.log
[stress.process.out] [thread 23441 also had an error]
[stress.process.out] [thread 23778 also had an error]
[stress.process.out] [thread 5683 also had an error]
[stress.process.out] #
[stress.process.out] # If you would like to submit a bug report, please visit:
[stress.process.out] # https://bugreport.java.com/bugreport/crash.jsp
[stress.process.out] #
[2020-12-22T23:34:53.931060657Z] Gathering output for process 5996
[2020-12-22T23:34:53.939810277Z] Waiting for completion for process 5996
[2020-12-22T23:34:53.939996969Z] Waiting for completion finished for process 5996
Output and diagnostic info for process 5996 was saved into 'pid-5996-output.log'

<snip>

result: Failed. Unexpected exit from test [exit code: 134]

Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007f4a685ee7b0): JavaThread "ExceptionStressModule" [_thread_in_Java, id=23442, stack(0x00007f4a4d902000,0x00007f4a4da03000)]

Stack: [0x00007f4a4d902000,0x00007f4a4da03000], sp=0x00007f4a4d9f8943, free space=986k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
C 0x00007f4a51802844

[error occurred during error reporting (printing native stack), id 0xb, SIGSEGV (0xb) at pc=0x00007f4a6e9c1201]


siginfo: si_signo: 4 (SIGILL), si_code: 2 (ILL_ILLOPN), si_addr: 0x00007f4a51802844

Register to memory mapping:

RAX=
[error occurred during error reporting (printing register info), id 0xb, SIGSEGV (0xb) at pc=0x00007f4a517e1448]

Registers:
RAX=0x00007f4a6cb27790, RBX=0x00000000000000a7, RCX=0x00007f4a6c826838, RDX=0x0000000000000007
RSP=0x00007f4a4d9f8943, RBP=0x00007f4a4da01780, RSI=0x00000000000000d8, RDI=0x0000000000000000
R8 =0x00000004e8bf4ab8, R9 =0x00007f4a517dd000, R10=0x00007f4a6fef2ba0, R11=0x0000000000000000
R12=0x0000000000000000, R13=0x00007f4a6c8267a3, R14=0x00007f4a4da01810, R15=0x00007f4a685ee7b0
RIP=0x00007f4a51802844, EFLAGS=0x0000000000010216, CSGSFS=0x002b000000000033, ERR=0x0000000000000000
  TRAPNO=0x0000000000000006

Top of Stack: (sp=0x00007f4a4d9f8943)
0x00007f4a4d9f8940:
[error occurred during error reporting (printing registers, top of stack, instructions near pc), id 0xb, SIGSEGV (0xb) at pc=0x00007f4a517e1448]


There aren't any good clues here for picking the right cat/subcat
so I'm starting this one in hotspot/runtime for initial triage.