java.lang.StackOverflowError: null（栈溢出异常）

@Service
public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> implements ISysUserService {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Override
    public SysUser saveSysUser(SysUser sysUser) {
        BCryptPasswordEncoder bcPassWord = new BCryptPasswordEncoder();
        sysUser.setPassword(bcPassWord.encode(sysUser.getPassword()));
        save(sysUser);
        return sysUser;
    }

    @Override
    public ResponseResult<SysUser> login(SysUser sysUser) {
        UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(sysUser.getUserName(),sysUser.getPassword());
        Authentication authentication = authenticationManager.authenticate(authenticationToken);
        if(Objects.isNull(authentication)){
            throw new RuntimeException("认证未通过");
        }
        return null;
    }

这里使用了@Resource就爆了这个异常，使用@Autowired就不报这个异常。原因尚未明确，等我以后来填坑