解决org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 问题

Posted 2023-01-29 沛沛老爹

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背景

今天在合并代码，进行打包的时候，突然发现代码跑步起来了。

把错误日志拉出来一看，好家伙，错误日志打印一大堆的

 "timestamp":"2022-05-23 22:30:47.544",
                    "level": "ERROR",
                    "thread": "main",
                    "class": "o.springframework.boot.SpringApplication",
                    "message": "Application run failed" 
                    
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'contentAspect': Unsatisfied dependency expressed through field 'topicService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'topServiceImpl': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'storeOrderService';
...

根据错误的反馈信息来看，应该是在初始化bean的时候，直接出错了。

然后每个Service里面又调用了其他的service。就导致了雪崩式的错误信息输出了。

还好代码是走的快速集成的模式。

把错误之前的代码和错误之后的代码进行了一个对比。

发现只有一个地方的代码的变动可能导致了这个问题。

问题定位

根据个人习惯，先把导致出错的代码找出来，比对下代码。

修改前代码

@Service
public class ActivityServiceImpl extends ServiceImpl<ActivityDao, ActivityEntity> implements ActivityService 

    private final CorrelationService  correlationService;
    private final RecordService recordService;


    public ActivityServiceImpl(CorrelationService correlationService,
                                        RecordService recordService) 
        this.correlationService = correlationService;
        this.recordService = recordService;
    

...

修改后代码

@Service
public class ActivityServiceImpl extends ServiceImpl<ActivityDao, ActivityEntity> implements ActivityService 

    private final CorrelationService  correlationService;
    private final RecordService recordService;
    private final OrderService orderService;

    public ActivityServiceImpl(CorrelationService correlationService,
                                        RecordService recordService,
                                        OrderService orderService) 
        this.correlationService = correlationService;
        this.recordService = recordService;
        this.orderService = orderService;
    

...

发现两处的代码只是多了一个service的初始化。

注：这个方式的初始化是IDEA的推荐方案。

按照正常来讲，应该是不会出现问题的。

但是既然有问题了，就把错误信息再仔细捋一遍（说实话，英语不好看起来确实比较费力，还好中间循环的Error creating bean with name相关的都可以省略，直接跳到后面错误相关和建议部分。

....
Bean with name 'orderServiceImpl' has been injected into other beans [ActivityServiceImpl] 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 'getBeanNamesForType' with the 'allowEagerInit' flag turned off, for example.

这段错误的相关信息引起了注意。

Bean with name 'orderServiceImpl' has been injected into other beans [ActivityServiceImpl] in its raw version as part of a circular reference, but has eventually been wrapped

按照这个说法来讲,orderServiceImpl已经被ActivityServiceImpl霸占了身子（被注入），同时是作为循环引用的一部分。