Issue when enabling eager initialization and using hibernate-reactive

Expected Behavior

The application should boot successfully (just like when it has eager initialization of singletons disabled).

Actual Behaviour

When the eager initialization of singletons is enabled, the following error can be seen:

15:19:48.141 [main] ERROR io.micronaut.runtime.Micronaut - Error starting Micronaut server: Bean definition [io.micronaut.reactor.http.client.sse.ReactorSseClientFactory] could not be loaded: Failed to initialize the bean [class io.micronaut.reactor.http.client.sse.ReactorSseClientFactory]: io/micronaut/http/client/sse/SseClientRegistry
io.micronaut.context.exceptions.BeanInstantiationException: Bean definition [io.micronaut.reactor.http.client.sse.ReactorSseClientFactory] could not be loaded: Failed to initialize the bean [class io.micronaut.reactor.http.client.sse.ReactorSseClientFactory]: io/micronaut/http/client/sse/SseClientRegistry
        at io.micronaut.context.DefaultBeanContext.initializeContext(DefaultBeanContext.java:1983)
        at io.micronaut.context.DefaultApplicationContext.initializeContext(DefaultApplicationContext.java:307)
        at io.micronaut.context.DefaultBeanContext.configureAndStartContext(DefaultBeanContext.java:3314)
        at io.micronaut.context.DefaultBeanContext.start(DefaultBeanContext.java:345)
        at io.micronaut.context.DefaultApplicationContext.start(DefaultApplicationContext.java:215)
        at io.micronaut.runtime.Micronaut.start(Micronaut.java:75)
        at io.github.lengors.Application.main(Application.java:12)
Caused by: io.micronaut.context.exceptions.BeanInstantiationException: Failed to initialize the bean [class io.micronaut.reactor.http.client.sse.ReactorSseClientFactory]: io/micronaut/http/client/sse/SseClientRegistry
        at io.micronaut.context.AbstractInitializableBeanDefinitionAndReference.load(AbstractInitializableBeanDefinitionAndReference.java:131)
        at io.micronaut.context.DefaultBeanContext.loadEagerBeans(DefaultBeanContext.java:2669)
        at io.micronaut.context.DefaultBeanContext.initializeContext(DefaultBeanContext.java:1981)
        ... 6 common frames omitted
Caused by: java.lang.NoClassDefFoundError: io/micronaut/http/client/sse/SseClientRegistry
        at io.micronaut.reactor.http.client.sse.$ReactorSseClientFactory$Definition.<clinit>(Unknown Source)
        at java.base/jdk.internal.misc.Unsafe.allocateInstance(Native Method)
        at java.base/java.lang.invoke.DirectMethodHandle.allocateInstance(DirectMethodHandle.java:501)
        at io.micronaut.core.io.service.SoftServiceLoader.lambda$collectDynamicServices$2(SoftServiceLoader.java:189)
        at io.micronaut.core.io.service.ServiceScanner$ServiceInstanceLoader.compute(ServiceScanner.java:402)
        at java.base/java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:194)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)
Caused by: java.lang.ClassNotFoundException: io.micronaut.http.client.sse.SseClientRegistry
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
        ... 11 common frames omitted

Steps To Reproduce

Simply clone the linked example and run:

./mvnw clean mn:run

Environment Information

• Operating System: Windows 11
• JDK: 21

Example Application

https://github.com/lengors/micronaut-hibernate-reactive-bug-demo

Version

4.6.2

Clone the linked micronaut-hibernate-reactive-bug-demo and run ./mvnw clean mn:run, then trace startup from Application.main through eager bean loading to ReactorSseClientFactory and the missing SseClientRegistry. Done means the example boots successfully with eager singleton initialization enabled, without the reported NoClassDefFoundError.