jacoco_test failing with openj9 jdk11 and 14

[nikolamilijevic1]

While adding the jacoco test suite to the openj9 external group, I noticed that there was one test consistently failing with openj9 jdk11 and 14 on all platforms (note the test passes with hotspot).

Here is the error message produced by https://ci.adoptopenjdk.net/view/Test_grinder/job/Grinder/4940/
Failed tests: startup_should_not_create_duplicate_class_definition(org.jacoco.core.runtime.InjectedClassRuntimeTest)
and
10:56:10 [[1;34mINFO[m] JaCoCo :: Test :: Core ............................. [1;31mFAILURE[m [ 3.992 s]

The failing test can be found at https://github.com/jacoco/jacoco/blob/master/org.jacoco.core.test/src/org/jacoco/core/runtime/InjectedClassRuntimeTest.java#L50-L61

[smlambert]

FYI @DanHeidinga @pshipton - passes on jdk8 j9

[DanHeidinga]

The test is skipped on JDK < 9:
https://github.com/jacoco/jacoco/blob/a20dc090fc5a0531da5b65ed454426b122374a56/org.jacoco.core.test/src/org/jacoco/core/runtime/InjectedClassRuntimeTest.java#L35

I'd start from the code that calls MethodHandles.Lookup.defineClass:
https://github.com/jacoco/jacoco/blob/a20dc090fc5a0531da5b65ed454426b122374a56/org.jacoco.core/src/org/jacoco/core/runtime/InjectedClassRuntime.java#L52-L58

[pshipton]

@tajila fyi

[tajila]

@hangshao0 Can you please take a look

[hangshao0]

eclipse-openj9/openj9#11243 is resolved. The latest OpenJ9 build should be able to pass test org.jacoco.core.runtime.InjectedClassRuntimeTest now.

[llxia]

Thanks @hangshao0 . @nikolamilijevic1 could you please re-enable the test? Thanks.

[llxia]

The test is re-enabled. PR #2105