Spring Cloud Task Scheduling Context Closed - spring

Question

When I run my task without the CommandLineRunner implemented and add the #Scheduled annotation it appears the context is being closed. How can I keep the context open so the #Scheduled can run properly?
DataTransferTask.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DataTransferTask {
public static void main(String[] args) {
SpringApplication.run(DataTransferTask.class, args);
}
}
DataTransferRunner.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.task.configuration.EnableTask;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.util.List;
#Component
#EnableTask
#EnableScheduling
public class DataTransferRunner {
#Autowired
public DataTransferRunner() {
}
#Scheduled(fixedRateString = "${job_concurrency.fixed-rate}")
public void run() throws Exception {
System.out.println("I started running");
}
}
Here is the exception I keep getting
Caused by: java.lang.IllegalStateException: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#21526f6c has been closed already
at org.springframework.context.support.AbstractApplicationContext.assertBeanFactoryActive(AbstractApplicationContext.java:1065) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBeanNamesForType(AbstractApplicationContext.java:1176) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.cloud.task.batch.configuration.TaskBatchExecutionListenerBeanPostProcessor.postProcessAfterInitialization(TaskBatchExecutionListenerBeanPostProcessor.java:59) ~[spring-cloud-task-batch-1.2.0.RELEASE.jar:1.2.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:423) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1633) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
... 73 common frames omitted

Answer 1

Since you have #EnableTask, spring will close the context once everything is done running. From the code it looks like you are not running anything explicitly so spring is closing the context before your #Schedule() annotation kicks in.
The fix for that is to tell spring to not close the context at all with spring.cloud.task.closecontext_enable=false. This will keep the context open for your scheduled task.
Some documentation here: https://docs.spring.io/spring-cloud-task/docs/1.2.2.RELEASE/reference/htmlsingle/#features-lifecycle
One more note about the property. In the documentation it says closecontext_enable but after inspecting the logs and the jar, that property has been deprecated and replaced by close_context_enabled.