1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

@Service
public class A {

    @Autowired
    private B b;

    public A() {
    }
}

@Service
public class B {

    @Autowired
    private A a;

    public B() {
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

@Service
public class A {

    @Autowired
    private B b;

    public A() {
    }
}

@Service
public class B {

    private A a;

    public B(A a) {
        this.a = a;
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

@Service
public class A {

    private B b;

    public A(B b) {
        this.b = b;
    }
}

@Service
public class B {

    @Autowired
    private A a;

    public B() {
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌─────┐
|  a defined in file [D:\Program\workspace\other\springboot\target\classes\com\wakzz\autowire\A.class]
↑     ↓
|  b (field private com.wakzz.autowire.A com.wakzz.autowire.B.a)
└─────┘

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

@Transactional
@Service
public class A {

    @Autowired
    private B b;

    public A() {
    }
}

@Service
public class B {

    @Autowired
    private A a;

    public B() {
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

@Async
@Service
public class A {

    @Autowired
    private B b;

    public A() {
    }
}

@Service
public class B {

    @Autowired
    private A a;

    public B() {
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'a': Bean with name 'a' has been injected into other beans [b] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:759) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:330) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:137) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
	at com.wakzz.Application.main(Application.java:20) [classes/:na]

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

@Service
public class A {

    @Autowired
    private B b;

    public A() {
    }
}

@Async
@Service
public class B {

    @Autowired
    private A a;

    public B() {
    }
}