KONNO Kazuhiro

I ran a 50x Grinder job (internal 43420) hoping PR #20173 fixed the problem, but the job failed in the same way as before.

1 failure in 40x Grinder job with Java 23: https://openj9-jenkins.osuosl.org/job/Grinder/4034/

I ran one more 40x Grinder job, and got no failure: https://openj9-jenkins.osuosl.org/job/Grinder/4036/

No failure in two Grinder jobs (80x in total): https://openj9-jenkins.osuosl.org/job/Grinder/4048/, https://openj9-jenkins.osuosl.org/job/Grinder/4049/ Java callstack of the current thread "load-4" from the javacore file: ``` 4XESTACKTRACE at java/lang/invoke/LambdaForm$DMH/0x00000000d800f1b0.invokeVirtual(LambdaForm$DMH(Compiled Code)) 4XESTACKTRACE at java/lang/invoke/LambdaForm$NFI/0x00000000e811e5f0.invoke_LJ_D(LambdaForm$NFI)...

Ah, I only ran "test sanity.functional" in PR #20972, and some tests in openjdk are failing. @gita-omr Would you open a PR for reverting #20972, please?

Jenkins test sanity zlinux jdk11,jdk17

Jenkins compile amac jdk17

There are methods (1) `String.indexOf(String)` and (2) `String.indexOf(String, int)`. When the Strings are in UTF-16, these methods call `StringUTF16` methods in Java 17+ as shown below: ``` (1) ↓ StringUTF16.indexOf([B[B)I...

@r30shah Can I ask you to look at this? It changes Z codegen. Thanks.

Jenkins test sanity zlinux jdk11,jdk17