카카오 로그인에 대한 외부접속을 구현하는 과정에서 발생하는 오류를 정리하였습니다!
1. 401 오류
2. persist 사용x 오류
ERROR 28060 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call; nested exception is javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call] with root cause
@Transactional
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