The following test failed in the JDK22 CI:

applications/javafuzzer/MediumTest.java

Here's a snippet from the log file:

#section:driver
----------messages:(7/305)----------
command: driver applications.javafuzzer.JavaFuzzerRunner -NT 50
reason: User specified action: run driver/timeout=21600 applications.javafuzzer.JavaFuzzerRunner -NT 50
started: Sun Sep 17 14:30:35 UTC 2023
Mode: agentvm
Agent id: 2
finished: Sun Sep 17 15:51:05 UTC 2023
elapsed time (seconds): 4829.941
----------configuration:(16/2449)----------

<snip>

----------System.out:(36/2669)----------
For random generator using seed: -606735860558289215
To re-run test with same seed value please add "-Djdk.test.lib.random.seed=-606735860558289215" to command line.
Using JRuby executable: /opt/mach5/mesos/work_dir/jib-master/install/org/jruby/jruby-dist/9.2.12.0/jruby-dist-9.2.12.0-bin.zip/jruby-9.2.12.0/bin/jruby
Starting JavaFuzzer: '/bin/bash /opt/mach5/mesos/work_dir/jib-master/install/com/oracle/jpg/bigapps/javafuzzer/javafuzzer/2.0/javafuzzer-2.0.zip/mrt.sh -R /opt/mach5/mesos/work_dir/slaves/cd627e65-f015-4fb1-a1d2-b6c9b8127f98-S173928/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/e66fbedc-caa6-4705-9f20-ac0723bad48b/runs/8cf948c1-2ab1-4277-8158-230b5d2f3b44/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_javafuzzer_MediumTest_java/scratch/0 -NT 50 -NP 12 -A -conf config.yml'
[2023-09-17T14:30:42.145497862Z] Gathering output for process 238310
[2023-09-17T15:51:05.554525337Z] Waiting for completion for process 238310
[2023-09-17T15:51:05.554789169Z] Waiting for completion finished for process 238310
Output and diagnostic info for process 238310 was saved into 'pid-238310-output.log'

Summary of the JavaFuzzer run:
------------------------------
Host: ubuntu-22-04-x64-759186
Tests: 12 x 50
Args: -conf config.yml

Started at: Sun Sep 17 14:30:42 UTC 2023


r12- 50: 33 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 17 Reference Java failures
r7- 50: 32 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 18 Reference Java failures
r4- 50: 31 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 19 Reference Java failures
r5- 50: 35 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 15 Reference Java failures
r10- 50: 31 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 19 Reference Java failures
r2- 50: 27 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 23 Reference Java failures
r1- 50: 36 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 14 Reference Java failures
r3- 50: 35 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 15 Reference Java failures
r9- 50: 30 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 20 Reference Java failures
r11- 50: 27 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 23 Reference Java failures
r8- 50: 31 passed, 0 crashes, 2 fails, 0 hangs, 0 incorrect tests, 18 Reference Java failures
r6- 50: 33 passed, 0 crashes, 0 fails, 0 hangs, 0 incorrect tests, 17 Reference Java failures

Finished at: Sun Sep 17 15:51:05 UTC 2023


[2023-09-17T15:51:05.623446277Z] Waiting for completion for process 238310
[2023-09-17T15:51:05.623697265Z] Waiting for completion finished for process 238310
----------System.err:(15/908)----------
java.lang.RuntimeException: assertEquals: expected 1 to equal 2
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertEquals(Asserts.java:205)
at jdk.test.lib.Asserts.assertEquals(Asserts.java:189)
at applications.javafuzzer.JavaFuzzerRunner.reportResults(JavaFuzzerRunner.java:244)
at applications.javafuzzer.JavaFuzzerRunner.runWithConfigurations(JavaFuzzerRunner.java:265)
at applications.javafuzzer.JavaFuzzerRunner.main(JavaFuzzerRunner.java:283)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1570)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: assertEquals: expected 1 to equal 2


The summary above has this line:

> r8- 50: 31 passed, 0 crashes, 2 fails, 0 hangs, 0 incorrect tests, 18 Reference Java failures

so we have two failures, but no obvious info about what those
failures are...

It has been a long time since I've seen a javafuzzer failure without
hs_err_pid files. I did download the test execution artifacts and I
did not find any hs_err_pid files.