Spring Scheduler does not work

Question

I have a problem with Spring's annotation based task scheduler - I can't get it working, I don't see any problem here...

application-context.xml

<task:scheduler id="taskScheduler" />
<task:executor id="taskExecutor" pool-size="1" />
<task:annotation-driven executor="taskExecutor" scheduler="taskScheduler" />

bean

@Service
public final class SchedulingTest {

    private static final Logger logger = Logger.getLogger(SchedulingTest.class);

    @Scheduled(fixedRate = 1000)
    public void test() {
        logger.debug(">>> Scheduled test service <<<");
    }

}

Artiodactyl

I get no errors and I expect to log the >>> Scheduled test service <<< message which doesn't happen... – Artiodactyl

is your logger configured properly, with the proper log level? – Bushranger

Answer 1

If you want to use task:annotation-driven approach and your @Scheduled annotation is not working, then you most probably missed context:component-scan in your context xml. Without this line, spring cannot guess where to search for your annotations.

<context:component-scan base-package="..." />

Pecten

Is there a spring-boot equivalent for the application.conf? – Alumna

Answer 2

Spring @Configuration (non-xml configuration) for annotation-driven tasks

Just add @EnableScheduling on your WebMvcConfig class

    import org.springframework.context.annotation.Configuration;
    import org.springframework.scheduling.annotation.EnableAsync;
    import org.springframework.scheduling.annotation.EnableScheduling;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

    @Configuration
    @EnableWebMvc
    @EnableAsync
    @EnableScheduling
    public class WebMvcConfig implements WebMvcConfigurer {
       /** Annotations config Stuff ... **/
    }

Blameless

adding @EnableScheduling saved my time a lot. Thanks very much – Prosthodontics

Answer 3

This is happening because by default Spring lazy initializes the beans.

Disable lazy initialization for the bean by placing this annotation

@Lazy(false)

on top of your @Component.

Antislavery

Answer 4

For me the solution that worked in Spring 5 was that I had to add @Component to the class having @Scheduled annotated methods.

Rabbet

Answer 5

After configuring the Schedulers, add @EnableScheduling in your main class.

Marras

Answer 6

I finally found a solution.

application-context.xml

<bean id="schedulingTest" class="...SchedulingTest" />

<task:scheduled-tasks>
    <task:scheduled ref="schedulingTest" method="test" cron="* * * * * ?"/>
</task:scheduled-tasks>

and the test() method without the annotation. This runs the method every second and works perfectly.

Artiodactyl

This surely works since you leaved the task:annotation-driven approach. You my look at the other answer for the missing line. Cheers – Vegetate

Answer 7

if you have dispatcher-servlet.xml move your configuration there. it worked for me and i have left a comment in this article: https://mcmap.net/q/453779/-why-isn-39-t-spring-running-my-scheduled-method

Metalliferous

Answer 8

The solution for me was to add in the applicationContext.xml:

<task:annotation-driven/>

with the following schemaLocation:

http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-3.0.xsd

Vierra

Answer 9

You should also check lazy-init to be false for that bean or use default-lazy-init="false" in beans.

That solved my problem.

Shot

Answer 10

I had to update my dispatcher-servlet.xml with

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/task
            http://www.springframework.org/schema/task/spring-task-4.3.xsd"></beans>

Bean definition below:

<bean id="scheduledTasks" class="com.vish.services.scheduler.ScheduledTasks"></bean>

Epa

Answer 11

We had the following reason: Service needed an interface (due to Transaction annotation) - IDE added this tx annotation also to interface. But @Scheduled was in implementing service class - and Spring ignored it since it thought that only annotations exist on the interface. So be careful to only have annotations on implementing classes!

Pigmy

Answer 12

Just add @EnableScheduling at any spring boot configuration class annotated with @Configuration and for the method that run the schedule job add @Scheduled annotation.

Alcove

Answer 13

Maybe it will be useful for someone. I ran into similar issue when I had a bean that did a long processing job in PostConstruct method. Thus, Spring Boot application didn't start (because PostConstruct method was in progress) and that's why my scheduled jobs didn't run (they start running after application startup).

Health

Answer 14

If you are using Grails with Spring Scheduler you will need to add to the top of your class.

static lazyInit = false

Source

Ingrained

Answer 15

Add @EnableScheduling on top of @SpringBootApplication and you need to make sure your class with @Scheduled is marked with @Service or @Component annotation.

Frottage