commysql.cj.jdbc.exceptions.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. Hereare the steps: 1. Use JDBC driver for Oracle database. A JDBC driver for Oracle must be present in your project's classpath. Click here to download Oracle Database JDBC driver. Choose the version according to your Oracle database installation (you must have an account in Oracle website to download. Sign up is free). Ihave an application with Jboss, Seam, Hibernate and h2. I wrote a simple action for importing data to the database from an external file. @Name("importAction") @AutoCreate @Scope(ScopeType.CONVERSATION) @Transactional public class ImportCosAction extends AbstractAction { saveOrUpdate(member); protected void saveOrUpdate(AbstractEntity entity) { final Session session = getSession(); session 2 In manyToMany relationship, When I'm trying to add a new driver with selected vehicle from dropdown list, it's throwing an exception java.sql.SQLException: Field 'vehicle_id' doesn't have a default value. However, if I set a default value in the DB, It works fine by inserting two different rows to the (driver_series_stats_xref) table, one 1 1) Adapt your entity that it includes the field "pincode". @Entity @Table (name="UserDetails") public class userDetails { @Column (name="pincode", columnDefinition="Number (10) default '34562'") int pincode; 2) or alter the underlying table so that the pincode field has a default value: JDBCexception on Hibernate data access: SQLException for SQL [n/a]; SQL state [XX001]; error code [0]; could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet .

jdbc exception on hibernate data access sqlexception for sql