升级spring boot异常:spring循环依赖
问题
从spring boot 2.2.9升级到2.6.2版本后,项目启动后访问报错
The dependencies of some of the beans in the application context form a cycle.
serviceCollectionIdCacheService
┌─────┐
| serviceProductInfoProviderImpl
↑ ↓
| serviceOfflineProviderImpl
↑ ↓
| serviceProductMappingProviderImpl
└─────┘
Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.
原因
在2.6.0之前,spring会自动处理循环依赖的问题,2.6.0 以后的版本默认禁止 Bean 之间的循环引用,如果存在循环引用就会启动失败报错。
解决
方案1:
清理循环引用的Bean
1、在字段上使用@Autowired注解,让Spring决定在合适的时机注入。
2、在@Autowired注解上方加上@Lazy注解(延迟加载)
(A—>B—>C—>D 一般在D引用A的@Autowired下加入@Lazy注解即可)
方案2:
it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.
也可以暂时跳过,在yml配置中加入
spring:
main:
allow-circular-references: true
方案3:
在启动中加入也一样
public static void main(String[] args) {
SpringApplication sa = new SpringApplication(xx.class);
sa.setAllowCircularReferences(Boolean.TRUE);//加入的参数
sa.run(args);
}
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版权声明:本文为CSDN博主「SangBigYe」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/CutelittleBo/article/details/122411294