Solve ORDS was unable to make a connection to the database
Many Oracle APEX developers & users encountered ORDS 503 Service Unavailable problems like: ORDS was unable to make a connection to the database. This can occur if the database is unavailable, the maximum number of sessions has been reached or the pool is not correctly configured. The connection pool named: |apex|| had the following error(s): ORA-28000: The account is locked. ORDS was unable to make a connection to the database. This can occur if the database is unavailable, the maximum number of sessions has been reached or the pool is not correctly configured. The connection pool named: |apex|| had the following error(s): ORA-28001: the password has expired The username or password for the connection pool named: |apex||, are invalid, expired, or the account is locked. The request could not be mapped to any database. Check the request URL is correct, and that URL to database mappings has been correctly configured. The Problem: Those errors were raised because...