Quarkus @ApplicationScoped working in dev run, but not in prod

[davidgomesdev]

Describe the bug

I have an abstract class, which has an implementation with @ApplicationScoped.

This works without an issue in quarkusDev, but when running the built app, it complains of a function that I have implemented in the abstract class.

java.lang.VerifyError: class me.l3n.[...].GoodReadsCrawlerService_ClientProxy overrides final method me.l3n.bot.[...].CrawlerService .parseHtml(Ljava/lang/String;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;

abstract class CrawlerService {
    protected suspend infix fun parseHtml(url: String): Document {
        /* ... */
    }
}

@ApplicationScoped
class GoodReadsCrawlerService: CrawlerService() {
    /* implements other abstract functions of base class */
}

Note that I'm not even overriding that parseHtml() function.

But if I change the GoodReadsCrawlerService to Singleton(), OR add the open keyword to parseHtml(), it works just fine in any case.

I'd assume the ClientProxy is treating the abstract class as an interface, so implements all functions for proxying, assuming they're all abstract.

But I believe this could be an issue with the prod proxy.

Expected behavior

The proxy should have the same behavior in dev and prod environments when dealing with an abstract class implementing a method.

Actual behavior

java.lang.VerifyError: class me.l3n.[...].GoodReadsCrawlerService_ClientProxy overrides final method me.l3n.bot.[...].CrawlerService .parseHtml(Ljava/lang/String;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;

Unless that method has the open keyword or the scope is changed to Singleton.

How to Reproduce?

In Kotlin, create an abstract class with a method implementation, then extend it from another class, with the @ApplicationScoped annotation.

Test in quarkusDev, then running the app produced in quarkusBuild.

An example can be found in my repo.

Output of uname -a or ver

Windows 10

Output of java -version

java version "11.0.12" 2021-07-20 LTS

GraalVM version (if different from Java)

No response

Quarkus version or git rev

2.6.1.Final

Build tool (ie. output of mvnw --version or gradlew --version)

Gradle 7.2

Additional information

No response

[quarkus-bot]

/cc @evanchooly

[stuartwdouglas]

@mkouba Could this be because of the additional interceptors that are applied in dev mode?

[mkouba]

@mkouba Could this be because of the additional interceptors that are applied in dev mode?

I don't think so.

But if I change the GoodReadsCrawlerService to Singleton(),

@Singleton works because we don't ceate a client proxy at all.

OR add the open keyword to parseHtml(), it works just fine in any case.

So from CDI POV a normal scoped bean may not declare final methods (a type with a final method is not proxyable). In Quarkus, we try to relax this requirement and remove the final modifier if needed (and if quarkus.arc.transform-unproxyable-classes=true).

@stuartwdouglas Could it be that quarkus transformations are not taken into account when used together with kotlin?

[geoand]

Does the application work if quarkus.arc.dev-mode.monitoring-enabled=false is set?

[davidgomesdev]

Does the application work if quarkus.arc.dev-mode.monitoring-enabled=false is set?

It doesn't. (neither in dev nor prod modes)

[stuartwdouglas]

Do you have a reproducer that does not require a discord account?

[davidgomesdev]

Just created one here.