Re: Core IT failures with AdoptOpenJDK 11 OpenJ9, but not with HotSpot

[Benjamin Marwell <bm...@apache.org>]

Hi Falko,

I regularly work with OpenJ9 and encountered such issues. Sometimes it
is a coding error which does not lead to an error in Hotspot,
sometimes it is a J9 problem (e.g. JIT problems, class loading, etc.).

If you want to dig in, there are a few things you can try:
The JVM option -verbose:class will show every class loaded.
You could also enable verbose GC to see if the class got somehow unloaded [1].
If it was loaded and is then unloaded early, you can try to use
-Xnoclassgc [2] and see if that helps.
If it does, please write down the exact commit ID you are working with
and create a github issue [3] at OpenJ9.

Please note that those options might not work on a hotspot VM.

Let us know if you found anything!

- Ben

[1]: https://www.eclipse.org/openj9/docs/xverbosegclog/
[2]: https://www.eclipse.org/openj9/docs/xclassgc/
[3]: https://github.com/eclipse/openj9/issues/new/choose

Am So., 28. Feb. 2021 um 19:59 Uhr schrieb Falko Modler <f....@gmx.net>:
>
> Hi everyone,
>
> with AdoptOpenJDK 11.0.10, I'm getting three test failures/errors with
> current masters of maven and maven-integration-testing, but only with
> the OpenJ9 variant, not with HotSpot.
>
> Is this a known problem?
>
> [ERROR] Failures:
> [ERROR]
> MavenITmng5482AetherNotFoundTest>AbstractMavenIntegrationTestCase.runTest:255->testPluginDependency:49->check:93
> Url to ClassNotFoundAether was not found in output.
> [ERROR]
> MavenITmng5482AetherNotFoundTest>AbstractMavenIntegrationTestCase.runTest:255->testPluginSite:55->check:93
> Url to ClassNotFoundAether was not found in output.
> [ERROR] Errors:
> [ERROR]
> MavenITmng5958LifecyclePhaseBinaryCompat>AbstractMavenIntegrationTestCase.runTest:255->testBad:43
> » Verification
>
> Cheers,
>
> Falko
>
>
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