java.lang.ClassNotFoundException: io.vertx.core.logging.SLF4JLogDelegateFactory

[nikodemusP]

Hi Jotschi,

Currently I try to get involved with graal and tried your example. The only difference is, that I used the released version of graal (19.1.1) and vert.x 3.8.0. The build worked fine, but this issue is raised at startup:

$ ./vertx-graalvm-native-image-test-0.0.1-SNAPSHOT
Exception in thread "main" java.lang.ExceptionInInitializerError
        at com.oracle.svm.core.hub.ClassInitializationInfo.initialize(ClassInitializationInfo.java:290)
        at java.lang.Class.ensureInitialized(DynamicHub.java:451)
        at de.jotschi.examples.Runner.main(Runner.java:18)
Caused by: java.lang.IllegalArgumentException: Error instantiating transformer class "io.vertx.core.logging.SLF4JLogDelegateFactory"
        at io.vertx.core.logging.LoggerFactory.initialise(LoggerFactory.java:54)
        at io.vertx.core.logging.LoggerFactory.<clinit>(LoggerFactory.java:32)
        at com.oracle.svm.core.hub.ClassInitializationInfo.invokeClassInitializer(ClassInitializationInfo.java:350)
        at com.oracle.svm.core.hub.ClassInitializationInfo.initialize(ClassInitializationInfo.java:270)
        ... 2 more
Caused by: java.lang.ClassNotFoundException: io.vertx.core.logging.SLF4JLogDelegateFactory
        at com.oracle.svm.core.hub.ClassForNameSupport.forName(ClassForNameSupport.java:60)
        at java.lang.ClassLoader.loadClass(Target_java_lang_ClassLoader.java:131)
        at io.vertx.core.logging.LoggerFactory.initialise(LoggerFactory.java:51)
        ... 5 more

Since you are the only one, which is using the logger-factory, mybe you have an idea, what the source could be?

Thx,
Nikolas

[Jotschi]

The code in this repo has not been updated for a while. I have however worked on another more practial approach in another example:

https://github.com/gentics/mesh-alexa-skill/tree/native

That example also uses logging. Maybe it can help you get your issue sorted out. (Check the native branch)

You should be able to build it via ./mvnw clean package -DskipTests -Pnative

[nikodemusP]

Thx, I will try it.
Nik

[fbuetler]

I made a fork and fixed the build to work with Vert.x 4.0.3, GraalVM 21.1.0 and Java 11.

[Jotschi]

@fbuetler Can you create a PR? I would like to keep this example up to date if possible. I want to start a new Vert.x 4 project and it would be nice if I could generate native images as well.

[fbuetler]

Sure, I can open a PR. However, I stripped out many things that seemed, from my point of view, unnecessary for a POC (like zeit.co). If you are fine with that I'm happy to open a PR.

[Jotschi]

@fbuetler Sure, I don't mind that.