Scheduled task with cron not working as expected

Hello. I have a simple Spring Boot application in which I just included the spring-boot-admin-starter-client (version 1.5.2). Everything works fine except for the scheduled method detailed below:

@Service
public class SomeService {

    @Scheduled(cron = "${cron.task.say.hello}")
    public void someMethod() {
        System.out.println("Hello world!");
    }

}

Being cron.task.say.hello: "* * * * * MON-FRI" in the application.yml file.

As you probably noticed it should print Hello world! every second but it doesn’t work. It prints the message every different periods of time. Sometimes it takes 30 seconds, sometimes 20, it varies.

The application´s entry point is below:

@EnableAsync
@EnableScheduling
@SpringBootApplication
public class SchedulerStarter {

    public static void main(String[] args) throws IOException {
        SpringApplication.run(SchedulerStarter.class, args);
    }

}

Removing spring-boot-admin-starter-client and then using spring-boot-starter works as expected.

Not sure if this is a bug or maybe I’m missing a piece of the puzzle.

[joshiste]

So basically it’s always a good idea to configure a TaskScheduler when using @EnableSchduling… Your TaskScheduler is picked up because of the name…

From the Spring code:

More than one TaskScheduler bean exists within the context, and none is named 'taskScheduler'. Mark one of them as primary or name it 'taskScheduler' (possibly as an alias); or implement the SchedulingConfigurer interface and call ScheduledTaskRegistrar#setScheduler explicitly within the configureTasks() callback

Since the scheduler provided by the SBA client is very similiar to the default one from @EnableScheduling and doesn’t interfere when you are providing a custom one, I tend to not fix this issue.

[damianfanaro]

I agree. This wasn’t an issue of SBA client just lack of knowledge of Spring Scheduling from my side.

Thanks for the feedback!