The following test failed in the JDK26 CI:

applications/jcstress/fences.java

Here's a snippet from the log file:

  HTML report generated at /opt/mach5/mesos/work_dir/slaves/f7f8bd65-a387-4a2b-b519-702f2fefaf87-S221143/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9385c50f-99fb-425d-ae9c-0da7aace4769/runs/11a68dea-1a12-49d3-a81e-315caaf59397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/scratch/results/index.html
Exception in thread "main" java.lang.AssertionError: TEST FAILURES:
org.openjdk.jcstress.tests.fences.varHandles.LoadLoadFenceTest.LoadLoadFenceChar [-Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/f7f8bd65-a387-4a2b-b519-702f2fefaf87-S221143/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9385c50f-99fb-425d-ae9c-0da7aace4769/runs/11a68dea-1a12-49d3-a81e-315caaf59397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/scratch, -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/f7f8bd65-a387-4a2b-b519-702f2fefaf87-S221143/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9385c50f-99fb-425d-ae9c-0da7aace4769/runs/11a68dea-1a12-49d3-a81e-315caaf59397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/scratch, -XX:MaxRAMPercentage=25, -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/24/36/bundles/linux-aarch64/jdk-24_linux-aarch64_bin.tar.gz/jdk-24, -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/f7f8bd65-a387-4a2b-b519-702f2fefaf87-S221143/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9385c50f-99fb-425d-ae9c-0da7aace4769/runs/11a68dea-1a12-49d3-a81e-315caaf59397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_jcstress_part3/tmp, -XX:+HeapDumpOnOutOfMemoryError, -XX:+CrashOnOutOfMemoryError, -Xmx768M] had timed out.

at org.openjdk.jcstress.infra.grading.ExceptionReportPrinter.work(ExceptionReportPrinter.java:63)
at org.openjdk.jcstress.JCStress.parseResults(JCStress.java:162)
at org.openjdk.jcstress.JCStress.run(JCStress.java:85)
at org.openjdk.jcstress.Main.main(Main.java:57)
]cout/cerr
java.lang.Error: jctress test finished with nonzero exitcode 1
at applications.jcstress.JcstressRunner.main(JcstressRunner.java:89)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)
at java.base/java.lang.Thread.run(Thread.java:1474)

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

result: Failed. Execution failed: `main' threw exception: java.lang.Error: jctress test finished with nonzero exitcode 1

I'm starting this issue off in hotspot/test for initial evaluation.