cmdLineTester_jfr_0 WorkLoad.generateClassLoader ArrayIndexOutOfBoundsException

[pshipton]

https://openj9-jenkins.osuosl.org/job/Test_openjdk11_j9_sanity.functional_aarch64_linux_Nightly_testList_0/1014
cmdLineTester_jfr_0

00:04:15  Testing: runWorkload - approx 30seconds
00:04:15  Test start time: 2025/10/25 04:04:15 Coordinated Universal Time
00:04:15  Running command: "/home/jenkins/workspace/Test_openjdk11_j9_sanity.functional_aarch64_linux_Nightly_testList_0/jdkbinary/j2sdk-image/bin/java"   -XX:StartFlightRecording --add-exports java.base/com.ibm.oti.vm=ALL-UNNAMED -cp /home/jenkins/workspace/Test_openjdk11_j9_sanity.functional_aarch64_linux_Nightly_testList_0/aqa-tests/TKG/../../jvmtest/functional/cmdLineTests/jfr/jfr.jar org.openj9.test.WorkLoad

...
'00:55:26   [ERR] Exception in thread "Thread-56" java.lang.RuntimeException: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 16
00:55:26   [ERR] 	at org.openj9.test.WorkLoad.generateClassLoader(WorkLoad.java:204)
00:55:26   [ERR] 	at org.openj9.test.WorkLoad.workload(WorkLoad.java:108)
00:55:26   [ERR] 	at org.openj9.test.WorkLoad.lambda$runWork$0(WorkLoad.java:81)
00:55:26   [ERR] 	at java.base/java.lang.Thread.run(Thread.java:836)
00:55:26   [ERR] Caused by: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 16
00:55:26   [ERR] 	at java.base/java.util.ArrayList.add(ArrayList.java:487)
00:55:26   [ERR] 	at java.base/java.util.ArrayList.add(ArrayList.java:499)
00:55:26   [ERR] 	at org.openj9.test.WorkLoad.generateClassLoader(WorkLoad.java:201)
00:55:26   [ERR] 	... 3 more

https://openj9-jenkins.osuosl.org/job/Test_openjdk11_j9_sanity.functional_x86-64_linux_Nightly_testList_0/943
cmdLineTester_jfr_0

00:12:16  Testing: runWorkload 2 - approx 2mins
00:12:16  Test start time: 2025/10/25 00:12:14 Eastern Standard Time
00:12:16  Running command: "/home/jenkins/workspace/Test_openjdk11_j9_sanity.functional_x86-64_linux_Nightly_testList_0/jdkbinary/j2sdk-image/bin/java"   -XX:StartFlightRecording --add-exports java.base/com.ibm.oti.vm=ALL-UNNAMED -cp /home/jenkins/workspace/Test_openjdk11_j9_sanity.functional_x86-64_linux_Nightly_testList_0/aqa-tests/TKG/../../jvmtest/functional/cmdLineTests/jfr/jfr.jar org.openj9.test.WorkLoad 200 20000 200

...
01:03:40   [ERR] Exception in thread "Thread-67" java.lang.RuntimeException: java.lang.ArrayIndexOutOfBoundsException
01:03:40   [ERR] 	at org.openj9.test.WorkLoad.generateClassLoader(WorkLoad.java:204)
01:03:40   [ERR] 	at org.openj9.test.WorkLoad.workload(WorkLoad.java:108)
01:03:40   [ERR] 	at org.openj9.test.WorkLoad.lambda$runWork$0(WorkLoad.java:81)
01:03:40   [ERR] 	at java.base/java.lang.Thread.run(Thread.java:836)
01:03:40   [ERR] Caused by: java.lang.ArrayIndexOutOfBoundsException
01:03:40   [ERR] 	at java.base/java.util.ArrayList.add(ArrayList.java:487)
01:03:40   [ERR] 	at java.base/java.util.ArrayList.add(ArrayList.java:499)
01:03:40   [ERR] 	at org.openj9.test.WorkLoad.generateClassLoader(WorkLoad.java:201)
01:03:40   [ERR] 	... 3 more

Changes from previous build:
9726848...873e452

[pshipton]

@hzongaro I think this has to be JIT.

[hzongaro]

No luck reproducing the failure in grinder runs. None of the recent JIT changes look like they would have caused (or exposed) this problem.

[pshipton]

https://openj9-jenkins.osuosl.org/job/Test_openjdk11_j9_sanity.functional_x86-64_linux_OMR_testList_1/738