IllegalAccessError invoking non-public @Scheduled method

[jimbogithub]

Describe the bug

An IllegalAccessError is thrown when invoking a non-public @scheduled method, e.g:

@scheduled(every = "PT10S", concurrentExecution = ConcurrentExecution.SKIP)
void myMethod() {...}

All is fine if the method is public.

Call stack looks like so:

2021-05-27 15:58:27,006 ERROR (executor-thread-2) [SimpleScheduler] Error occured while executing task for trigger IntervalTrigger [id=1_my.redacted.Service_ScheduledInvoker_myMethod_8d0ea617bdcf7cab33987d918fbaeabfd51940d4, interval=10000]
java.lang.IllegalAccessError: class my.redacted.Service_ScheduledInvoker_myMethod_8d0ea617bdcf7cab33987d918fbaeabfd51940d4 tried to access method my.redacted.Service.myMethod()V (my.redacted.Service_ScheduledInvoker_myMethod_8d0ea617bdcf7cab33987d918fbaeabfd51940d4 is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @451b1c01; my.redacted.Service is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @6f45da6b)
at my.redacted.Service_ScheduledInvoker_myMethod_8d0ea617bdcf7cab33987d918fbaeabfd51940d4.invokeBean(Service_ScheduledInvoker_myMethod_8d0ea617bdcf7cab33987d918fbaeabfd51940d4.zig:46)
at io.quarkus.arc.runtime.BeanInvoker.invoke(BeanInvoker.java:20)
at io.quarkus.scheduler.runtime.SkipConcurrentExecutionInvoker.invoke(SkipConcurrentExecutionInvoker.java:37)
at io.quarkus.scheduler.runtime.SkipConcurrentExecutionInvoker.invoke(SkipConcurrentExecutionInvoker.java:19)
at io.quarkus.scheduler.runtime.SimpleScheduler$ScheduledTask$1.run(SimpleScheduler.java:251)
at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:486)
at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2442)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1450)
at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:834)

Expected behavior

Expect it to work ok with default access per other Quarkus/CDI methods.

Actual behavior

Fails with IllegalAccessError.

Quarkus version or git rev

2.0.0.CR1

[quarkus-bot]

/cc @mkouba

[mkouba]

Hello @jimbogithub, could you describe your application structure in more detail? We use the package-private @Scheduled methods in the tests and in the quickstart without any problem. Private methods are not supported.

It seems that the invoker class and the service class are loaded by a different class loader. Isn't the my.redacted.Service class located in a shared library, i.e. outside the application src/main/java?

[jimbogithub]

Hello @jimbogithub, could you describe your application structure in more detail? We use the package-private @Scheduled methods in the tests and in the quickstart without any problem. Private methods are not supported.

It seems that the invoker class and the service class are loaded by a different class loader. Isn't the my.redacted.Service class located in a shared library, i.e. outside the application src/main/java?

Yes, you're correct, the my.redacted.Service class is located in a shared library (actually just a test dependency in this case as part of a semi-integration test of two interrelated modules).

Looks like you have the fix, thanks.

[jimbogithub]

Confirmed fixed for me in 2.0.0.CR2.