Spring's @Scheduled error : Only one AsyncAnnotationBeanPostProcessor may exist within the context

Question

I am trying Spring 3's @Scheduled annotation . Here is my configuration (app.xml) :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:task="http://www.springframework.org/schema/task"
  xsi:schemaLocation="
      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
      http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd
      "
>

  <context:component-scan base-package="destiny.web"/>  
  <context:annotation-config/>
  // other beans

  <task:annotation-driven executor="myExecutor" scheduler="myScheduler"/>
  <task:executor  id="myExecutor"  pool-size="5"/>
  <task:scheduler id="myScheduler" pool-size="10"/>
</beans>

And this is my service class :

@Service
public class ServiceImpl implements Service , Serializable
{
  //other injections

  @Override
  @Transactional
  public void timeConsumingJob()
  {
    try
    {
      Thread.sleep(10*1000);
    }
    catch (InterruptedException e)
    {
      e.printStackTrace();
    }
  }

  @Override
  @Scheduled(cron="* * * * * ?") 
  public void secondly()
  {
    System.err.println("secondly : it is " + new Date());
  }
}

It works fine when testing in my eclispe + junit , when testing a timeConsumingJob method , I can see secondly() continues outputting message secondly.

But when deployed to a container (Resin/4.0.13) , it throws :

[11-03-26 12:10:14.834] {main} org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Only one AsyncAnnotationBeanPostProcessor may exist within the context.
Offending resource: class path resource [app.xml]
 at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
 at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
 at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:72)
 at org.springframework.scheduling.config.AnnotationDrivenBeanDefinitionParser.parse(AnnotationDrivenBeanDefinitionParser.java:82)

I searched but seldom find similar situations , I think it is the most basic setting , but don't know why it doesn't work .

Can somebody take a look at it ? Thanks a lot !

(Spring 3.0.5 , Resin 4.0.13)

------------ updated ---------

After I dig deeper , I found the app.xml is imported by another xml. Maybe this is the reason makes task:annotation-driven not working.

Well , after re-arranging some beans' location , it is solved, but I still feel puzzled. (Because it worked fine , and other.xml needs beans in app.xml )

Arr you sure you're not including app.xml twice, somehow? How have you configured that? — skaffman
Hi , I am sure app.xml is included once. (in web.xml's context-param's contextConfigLocation ) — smallufo
Hi, thnx, I had same problem and got solved now. In my case also, the xml file was imported at two places and so was getting this error but then removed that import from one place and now resolved this error. — Mital Pritmani

Tomáš Záluský Tomáš Záluský · Accepted Answer · 2011-11-03T15:08:34

The application context is being initialized twice but org.springframework.scheduling.config.AnnotationDrivenBeanDefinitionParser fails registering bean ASYNC_ANNOTATION_PROCESSOR_BEAN_NAME second time.

I encountered this problem in unit tests where @ContextConfiguration("/path/to/applicationContext.xml") was accidentally on both the parent test class and child test class (with default value of inheritLocations true).

Spring's @Scheduled error : Only one AsyncAnnotationBeanPostProcessor may exist within the context

7 Answers