👻 [WHYGRAM] | 시큐리티 - UnsatisfiedDependencyException , 세큐리티 적용 후 user/join 화면 안열림

🔹 에러

• 세큐리티 적용 후 user/join 화면 안열림

🔹 에러메시지

org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'userController': 
Unsatisfied dependency expressed through field 'service';
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'userService': 
Unsatisfied dependency expressed through field 'passwordEncoder'; 
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'securityConfig': 
Unsatisfied dependency expressed through field 'userDetailsService'; 
nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'inMemoryUserDetailsManager' defined 
in class path resource [org/springframework/boot/autoconfigure/security/servlet/UserDetailsServiceAutoConfiguration.class]: 
Bean instantiation via factory method failed; 
nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [org.springframework.security.provisioning.InMemoryUserDetailsManager]: 
Factory method 'inMemoryUserDetailsManager' threw exception; 
nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: 
Error creating bean with name 'passwordEncoder': 
Requested bean is currently in creation: 
Is there an unresolvable circular reference?

• 그냥 톰캣 실행만 해도 에러가 뜬다

org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'springSecurityFilterChain' defined 
in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: 
Bean instantiation via factory method failed; 
nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [javax.servlet.Filter]: 
Factory method 'springSecurityFilterChain' threw exception;
nested exception is java.lang.IllegalArgumentException:
defaultTarget must start with '/' or with 'http(s)'

🔹 해결

SecurityConfig의 42번 라인에
1. feed/home 경로가 없었다
2. / feed/home 이라고 적어야 하는데 feed/home이라고 적어서, 즉 /를 빼먹었다
3. 경로(컨트롤러)와 html을 만들고 /feed/home이라고 적어주니 해결되었다