Mongo: Class Not Found jnr.unixsocket.UnixSocket when running in Native

Describe the bug We have a project that uses a lot of Quarkus extensions at the same time. One of these extensions is Mongo Panache and seems to be an incompatibility because when compiling the project in JVM, it works, but not in Native with the following error:

[002-quarkus-all-extensions-1.0.0-SNAPSHOT-runner:24]    classlist:  45.993,33 ms,  1,96 GB
[002-quarkus-all-extensions-1.0.0-SNAPSHOT-runner:24]        setup:   3.249,06 ms,  1,96 GB
Fatal error:java.lang.NoClassDefFoundError
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:603)
	at java.base/java.util.concurrent.ForkJoinTask.get(ForkJoinTask.java:1006)
	at com.oracle.svm.hosted.NativeImageGenerator.run(NativeImageGenerator.java:488)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.buildImage(NativeImageGeneratorRunner.java:370)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.build(NativeImageGeneratorRunner.java:529)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.main(NativeImageGeneratorRunner.java:119)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner$JDK9Plus.main(NativeImageGeneratorRunner.java:561)
Caused by: java.lang.NoClassDefFoundError: jnr/unixsocket/UnixSocket
	at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
	at java.base/java.lang.Class.getDeclaredMethods(Class.java:2309)
	at com.oracle.svm.hosted.substitute.AnnotationSubstitutionProcessor.handleDeletedClass(AnnotationSubstitutionProcessor.java:512)
	at com.oracle.svm.hosted.substitute.AnnotationSubstitutionProcessor.handleClass(AnnotationSubstitutionProcessor.java:305)
	at com.oracle.svm.hosted.substitute.AnnotationSubstitutionProcessor.init(AnnotationSubstitutionProcessor.java:265)
	at com.oracle.svm.hosted.NativeImageGenerator.createDeclarativeSubstitutionProcessor(NativeImageGenerator.java:929)
	at com.oracle.svm.hosted.NativeImageGenerator.setupNativeImage(NativeImageGenerator.java:863)
	at com.oracle.svm.hosted.NativeImageGenerator.doRun(NativeImageGenerator.java:561)
	at com.oracle.svm.hosted.NativeImageGenerator.lambda$run$0(NativeImageGenerator.java:476)
	at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: java.lang.ClassNotFoundException: jnr.unixsocket.UnixSocket
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	... 16 more

Note that when using only Mongo Panache, it works fine. I could not identify what other extension is causing Mongo to fail with this missing class.

Expected behavior The project should work fine regardless the number of Quarkus extensions we’re using.

Actual behavior It fails to compile, see exception above.

To Reproduce 1- git clone https://github.com/Sgitario/beefy-scenarios 2- git checkout reproducer_15434 3- cd beefy-scenarios/002-quarkus-all-extensions 4- mvn clean verify -Dquarkus.native.builder-image=quay.io/quarkus/ubi-quarkus-native-image:21.0.0-java11 -Dnative -Dquarkus.native.container-build=true (it needs to have built quarkus master locally)

Environment (please complete the following information):

• Quarkus version or git rev: 999-SNAPSHOT (1.12.1.Final)

[loicmathieu]

@Sgitario as a workaround you can include the jnr library or add the --allow-incomplete-class-path flag to native.

I will work on a substitution to fix the issue, I don’t want to always include this dependency.

[Sgitario]

I’ve confirmed that this is indeed fixed. Thanks a lot!