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org.hibernate.exception.GenericJDBCException: Cannot open connection*	at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(	at org.hibernate.exception.ErrorCodeConverter.convert(	at org.hibernate.exception.JDBCExceptionHelper.convert(	at org.hibernate.exception.JDBCExceptionHelper.convert(	at org.hibernate.jdbc.ConnectionManager.openConnection(	at org.hibernate.jdbc.ConnectionManager.getConnection(	at org.hibernate.jdbc.JDBCContext.connection(	at org.hibernate.transaction.JDBCTransaction.begin(	at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(	at org.hibernate.jdbc.JDBCContext.beginTransaction(	at org.hibernate.impl.SessionImpl.beginTransaction(	at	at