@Entity
@Table(name = "ticket")
@XmlRootElement
public class Ticket implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "ticket_id")
private Long ticketId;
@Column(name = "description")
private String description;
@Column(name = "note")
private String note;
@ManyToOne(targetEntity=LoginInfo.class,cascade=CascadeType.ALL)
private LoginInfo createdBy;

@Entity
@Table(name = "login_info")
@XmlRootElement
public class LoginInfo implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "login_info_id")
private Long loginInfoId;
@Column(name = "username")
private String username;
@Column(name = "pwd")
private String pwd;
@Column(name = "role")
private String role = "user";
@OneToMany(cascade=CascadeType.ALL, mappedBy="loginInfo1")
private List<UserInfo> userInfoList;
@OneToMany(cascade=CascadeType.MERGE, mappedBy="createdBy")
private List<Ticket> createdByList;

public Ticket create(Ticket t) {

    Ticket ticket = new Ticket();
    try{
        //LoginInfo login = findUser(t.getCreatedBy().getUsername());
        tx.begin();
        ticket.setDescription(t.getDescription());
        ticket.setNote(t.getNote());
        ticket.setDateCreated(new Date());
        ticket.setCreatedBy(t.getCreatedBy());
        em.persist(ticket);
        tx.commit();
    }catch(Exception e){
        e.toString();
    }

    return ticket;
}

Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException:
Column 'pwd' cannot be null
Error Code: 1048
Call: INSERT INTO login_info (pwd, role, username) VALUES (?, ?, ?)
bind => [3 parameters bound]