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https://issues.apache.org/jira/browse/GROOVY-9933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17281708#comment-17281708
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Paul King commented on GROOVY-9933:
-----------------------------------
I can't see any check for Java version, we just didn't seem to log anything in
that case which meant there was no way to tell what went wrong in other
scenarios:
https://github.com/apache/groovy/commit/2737292fcc9
We'll have to think about possibilities. One option might be to have special
code to not log the ClassNotFoundException case but log a friendly message
instead, e.g. "JDK9 class not found, assuming JDK8" or similar, but still log
the exception in other cases.
> Exceptions logged on Java 8
> ----------------------------
>
> Key: GROOVY-9933
> URL: https://issues.apache.org/jira/browse/GROOVY-9933
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 3.0.7
> Environment: MacOS
> Reporter: Benjamin Muskalla
> Priority: Minor
>
> When using Groovy 3.0.7 on a JDK 8, the following exception is logged. This
> causes problems for other parties scanning logs for exceptions and users
> trying to find real problems. The exception in question doesn't seem to be a
> problem though as it is expected to not find Java 9 classes on Java 8. In
> Groovy 2.x, this used to not log errors as it checked the java major version
> before loading the class.
>
> {code:java}
> 2021-02-09T10:13:25.639+0100 [DEBUG]
> [org.codehaus.groovy.vmplugin.VMPluginFactory] Trying to create VM plugin
> `org.codehaus.groovy.vmplugin.v9.Java9` by checking `java.lang.Module`, but
> failed:
> java.lang.ClassNotFoundException:
> java.lang.Modulejava.lang.ClassNotFoundException: java.lang.Module at
> java.net.URLClassLoader.findClass(URLClassLoader.java:382) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:419) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:352) at
> org.codehaus.groovy.vmplugin.VMPluginFactory.lambda$createPlugin$0(VMPluginFactory.java:61)
> at java.security.AccessController.doPrivileged(Native Method) at
> org.codehaus.groovy.vmplugin.VMPluginFactory.createPlugin(VMPluginFactory.java:58)
> at
> org.codehaus.groovy.vmplugin.VMPluginFactory.<clinit>(VMPluginFactory.java:45)
> at
> org.codehaus.groovy.reflection.ReflectionUtils.<clinit>(ReflectionUtils.java:47)
> at
> org.codehaus.groovy.reflection.CachedClass$3.lambda$initValue$1(CachedClass.java:90)
> at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
> at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
> at
> java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
> at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
> at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:546) at
> java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
> {code}
>
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