Ao tentar executar a classe TesteConta da Aula 2, vídeo 2 (Configuração e Inicialização da JPA) , do "Curso de Java e JPA: Persista seus objetos com a JPA2 e Hibernate", formação Java EE, obtenho o seguinte erro:
WARN: SQL Error: 0, SQLState: 08S01 jun 01, 2019 10:45:32 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions ERROR: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237)
Caused by: org.hibernate.exception.JDBCConnectionException: Error calling Driver#connect at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:115) at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method)
