1. 오류상황 : 테스트 서버 접속 안됨. (오류메세지) Caused by: jJava.lang.reflect.InvocationTargetException ... Caused by: com.ibatis.common.jdbc.exception.NestedSQLException: --- The error occurred in sqlmaps/empty.xml. --- The error occurred while executing query. --- Check the (쿼리) --- Check the SQL Statement (preparation failed). --- Cause: com.mysql.jdbc.CommunicationsException: Communications link failure due..