IllegalAccessError for gauges with Micrometer + MP Metrics binder

[jmartisk]

Describe the bug

Creating an annotated org.eclipse.microprofile.metrics.annotation.Gauge when I use the Micrometer with the MP Metrics binder causes an error during gauge registration:

2021-09-10 07:40:04,106 ERROR [io.qua.run.Application] (Quarkus Main Thread) Failed to start application (with profile dev): java.lang.IllegalAccessError: failed to access class io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetadata from class org.acme.GreetingResource_GaugeAdapter_Subclass (io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetadata is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @a73ea75; org.acme.GreetingResource_GaugeAdapter_Subclass is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @4fdd30b2)
	at org.acme.GreetingResource_GaugeAdapter_Subclass.getMetadata(GreetingResource_GaugeAdapter_Subclass.zig:732)
	at org.acme.GreetingResource_GaugeAdapter_ClientProxy.getMetadata(GreetingResource_GaugeAdapter_ClientProxy.zig:276)
	at io.quarkus.micrometer.runtime.binder.mpmetrics.MetricRegistryAdapter.bindAnnotatedGauge(MetricRegistryAdapter.java:233)
	at io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetricsBinder.bindTo(MpMetricsBinder.java:30)
	at io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetricsBinder_Subclass.bindTo$$superforward1(MpMetricsBinder_Subclass.zig:98)
	at io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetricsBinder_Subclass$$function$$1.apply(MpMetricsBinder_Subclass$$function$$1.zig:33)
	at io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:54)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.proceed(InvocationInterceptor.java:62)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.monitor(InvocationInterceptor.java:51)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor_Bean.intercept(InvocationInterceptor_Bean.zig:521)
	at io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:41)
	at io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:41)
	at io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:32)
	at io.quarkus.micrometer.runtime.binder.mpmetrics.MpMetricsBinder_Subclass.bindTo(MpMetricsBinder_Subclass.zig:162)
	at io.quarkus.micrometer.runtime.MicrometerRecorder.lambda$configureRegistries$4(MicrometerRecorder.java:130)
	at java.base/java.lang.Iterable.forEach(Iterable.java:75)
	at io.quarkus.micrometer.runtime.MicrometerRecorder.configureRegistries(MicrometerRecorder.java:130)
	at io.quarkus.deployment.steps.MicrometerProcessor$configureRegistry-2125003310.deploy_0(MicrometerProcessor$configureRegistry-2125003310.zig:127)
	at io.quarkus.deployment.steps.MicrometerProcessor$configureRegistry-2125003310.deploy(MicrometerProcessor$configureRegistry-2125003310.zig:40)
	at io.quarkus.runner.ApplicationImpl.doStart(ApplicationImpl.zig:766)
	at io.quarkus.runtime.Application.start(Application.java:101)
	at io.quarkus.runtime.ApplicationLifecycleManager.run(ApplicationLifecycleManager.java:101)
	at io.quarkus.runtime.Quarkus.run(Quarkus.java:66)
	at io.quarkus.runtime.Quarkus.run(Quarkus.java:42)
	at io.quarkus.runtime.Quarkus.run(Quarkus.java:119)
	at io.quarkus.runner.GeneratedMain.main(GeneratedMain.zig:29)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at io.quarkus.runner.bootstrap.StartupActionImpl$1.run(StartupActionImpl.java:100)
	at java.base/java.lang.Thread.run(Thread.java:834)

Expected behavior

No response

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

openjdk version "11.0.10" 2021-01-19 OpenJDK Runtime Environment GraalVM CE 21.0.0.2 (build 11.0.10+8-jvmci-21.0-b06) OpenJDK 64-Bit Server VM GraalVM CE 21.0.0.2 (build 11.0.10+8-jvmci-21.0-b06, mixed mode, sharing)

GraalVM version (if different from Java)

No response

Quarkus version or git rev

Quarkus 2.2.2

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

No response

Additional information

Happens only in JVM mode

[quarkus-bot]

/cc @ebullient, @kenfinnigan