org.hibernate.HibernateException: A collection with cascade="alldeleteorphan" was no longer referenced by the owning entity instance:

如果你是以上的错误请以下

hibernate  级联更新并删除，方法如：实体users与T，OneToMany关系。更新users表时级联删除、更新、添加T

import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.Cascade;

/**
 * Users entity.
 * 
 * @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "users", catalog = "test")
public class Users implements java.io.Serializable {

    // Fields

    private String uuid;
    private String userName;
    private String passwd;
    private Integer gender;
    private Set<T> ts = new HashSet<T>(0);

    // Constructors

    /** default constructor */
    public Users() {
    }

    /** minimal constructor */
    public Users(String uuid, String userName, String passwd) {
        this.uuid = uuid;
        this.userName = userName;
        this.passwd = passwd;
    }

    /** full constructor */
    public Users(String uuid, String userName, String passwd, Integer gender,
            Set<T> ts) {
        this.uuid = uuid;
        this.userName = userName;
        this.passwd = passwd;
        this.gender = gender;
        this.ts = ts;
    }

    // Property accessors
    @Id
    @Column(name = "UUID", unique = true, nullable = false, length = 32)
    public String getUuid() {
        return this.uuid;
    }

    public void setUuid(String uuid) {
        this.uuid = uuid;
    }

    @Column(name = "userName", nullable = false, length = 20)
    public String getUserName() {
        return this.userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    @Column(name = "passwd", nullable = false, length = 32)
    public String getPasswd() {
        return this.passwd;
    }

    public void setPasswd(String passwd) {
        this.passwd = passwd;
    }

    @Column(name = "gender")
    public Integer getGender() {
        return this.gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "users")
    @Cascade(value = { org.hibernate.annotations.CascadeType.ALL,
            org.hibernate.annotations.CascadeType.DELETE_ORPHAN })
    public Set<T> getTs() {
        return this.ts;
    }

    private void setTs(Set<T> ts) {
        this.ts.clear();
        this.ts = ts;
    }
    
    public void addTs(T t){
        getTs().add(t);
        t.setUsers(this);

    }

}

实体T

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

/**
 * T entity.
 * 
 * @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "t", catalog = "test")
public class T implements java.io.Serializable {

	// Fields

	private String id;
	private Users users;

	// Constructors

	/** default constructor */
	public T() {
	}

	/** full constructor */
	public T(String id, Users users) {
		this.id = id;
		this.users = users;
	}

	// Property accessors
	@Id
	@Column(name = "id", unique = true, nullable = false, length = 32)
	public String getId() {
		return this.id;
	}

	public void setId(String id) {
		this.id = id;
	}

	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "t1", nullable = false)
	public Users getUsers() {
		return this.users;
	}

	public void setUsers(Users users) {
		this.users = users;
	}

}

需求：

1、删除

  Users user = (Users) session.get(Users.class,"1");
  user.getTs().clear();
  user.setPasswd("144");
  session.update(user);

2、添加

  Users user = (Users) session.get(Users.class,"1");
  user.getTs().clear();
  T t = new T("2",user);
  user.addTs(t);
  user.setPasswd("144");
  session.update(user);

3、更新