Micronaut 4: Expression in @Scheduled is not resolved at runtime

[saw303]

I'm migrating a Micronaut 3.9.x application to Micronaut 4.0.1. The application contains a scheduled job using a fixed rate provided through configuration.

@Scheduled(
      fixedRate = "${sales-system.offers.clean-up.fixed-rate}",
      condition = "#{!this.paused}")
@ReadOnly
public void deleteExpiredOfferLeads() { }

When running the tests or starting the application I get the following error message. For some reason, I currently do not yet understand, Micronaut does not resolve the expression ${sales-system.offers.clean-up.fixed-rate}.

io.micronaut.scheduling.exceptions.SchedulerConfigurationException: Invalid @Scheduled definition for method: void deleteExpiredOfferLeads() - Reason: Invalid fixed rate definition: ${sales-system.offers.clean-up.fixed-rate}
	at io.micronaut.scheduling.processor.ScheduledMethodProcessor.lambda$process$3(ScheduledMethodProcessor.java:161)
	at java.base/java.util.Optional.orElseThrow(Optional.java:403)
	at io.micronaut.scheduling.processor.ScheduledMethodProcessor.process(ScheduledMethodProcessor.java:160)
	at io.micronaut.context.DefaultBeanContext.lambda$initializeContext$31(DefaultBeanContext.java:2032)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1423)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1311)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1841)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1806)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

I was wondering if someone knows how to tackle this one, since ScheduledMethodProcessor does not seem to have any expression evaluation features in io.micronaut.scheduling.processor.ScheduledMethodProcessor#process. Can anyone give some hints on this?

Update 2023-07-27

The issue seems to be related when using the condition attribute in the @Scheduled annotation. If I remove the condition parameter, everything works as with Micronaut 3.x

I have filed an issue for this since I think this is bug.

[saw303]

TL;DR that's most likely a bug in Micronaut 4.0.0 and 4.0.1.

I'm closing this, since the rest of the discussion will be at #9622