问题随记

在使用 AuthenticationManager 的时候，出现循环依赖问题 —— java.lang.StackOverflowError，查资料查了两天半，终于找到原因。

2024-06-16T17:54:19.487+08:00 ERROR 20672 --- [nio-8789-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed: java.lang.StackOverflowError] with root cause

java.lang.StackOverflowError: null
	at java.base/java.lang.ref.Reference.refersToImpl(Reference.java:375) ~[na:na]
	at java.base/java.lang.ref.Reference.refersTo(Reference.java:366) ~[na:na]
	at java.base/java.lang.reflect.AccessibleObject.isAccessChecked(AccessibleObject.java:664) ~[na:na]
	at java.base/java.lang.reflect.AccessibleObject.verifyAccess(AccessibleObject.java:695) ~[na:na]
	at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:673) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:560) ~[na:na]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-6.0.4.jar:6.0.4]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:211) ~[spring-aop-6.0.4.jar:6.0.4]
	at jdk.proxy2/jdk.proxy2.$Proxy74.authenticate(Unknown Source) ~[na:na]
	at jdk.internal.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-6.0.4.jar:6.0.4]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:211) ~[spring-aop-6.0.4.jar:6.0.4]
	at jdk.proxy2/jdk.proxy2.$Proxy74.authenticate(Unknown Source) ~[na:na]
	at jdk.internal.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-6.0.4.jar:6.0.4]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:211) ~[spring-aop-6.0.4.jar:6.0.4]
	at jdk.proxy2/jdk.proxy2.$Proxy74.authenticate(Unknown Source) ~[na:na]
	……

问题解决

在查找很多资料以及再次复现代码后，终于找到问题，问题出在自己实现的 MyUserDetailsServiceImpl 没有继承 UserDetailsService，才导致该问题。

让 MyUserDetailsServiceImpl 使用 UserDetailsService 该接口或者让 MyUserDetailsServiceImpl 使用的 MyUserDetailsService 继承 UserDetailsService 接口即可

// 方法 1
@Service
public class MyUserDetailsServiceImpl implements MyUserDetailsService, UserDetailsService {


    @Autowired
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        UserEntity user = userService.findByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException("User not found");
        }
        return new SecurityUser(user);
    }
}

// 方法 2
public interface MyUserDetailsService extends UserDetailsService {
    UserDetails loadUserByUsername(String username) throws UsernameNotFoundException;
}

出现该问题的原因可能不止这一个，比如使用两种登录机制出现该问题就要使用 @Lazy 来解决该问题