我正在尝试使用以下代码保存qcomputer的linkedlist：

public void saveOrUpdateAll(Collection list) {
    final Session ses = getTxManager().getSessionFactory().getCurrentSession();
    list.stream().forEach((object) -> {
        ses.saveOrUpdate(object);
    });
    ses.flush();
}

如果qcomputer中的变量planservices（表services\ to\ u ip）不为空，则获取异常，否则数据存储在表ip\ to\ u单元中：

[IllegalArgumentException occurred calling getter of ru.apertum.qsystem.server.model.QComputer.ip]
(org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of ru.apertum.qsystem.server.model.QComputer.ip)
SQL: 
    at ru.apertum.qsystem.client.forms.FAdmin.saveConfiguration(FAdmin.java:1910)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:662)
    at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
    at java.awt.Component.processMouseEvent(Component.java:6533)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6298)
    at java.awt.Container.processEvent(Container.java:2236)
    at java.awt.Component.dispatchEventImpl(Component.java:4889)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2746)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.Event

运行（eventdispatchthread.run）。java:82)
qcomputer.java（mysql中的ip\到\单位表）：

public QComputer() { }

private Long id;

@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
    return id;
}

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

private String ip;

public void setIp(String ip) {
    this.ip = ip;
}

@Column(name = "ip")
public String getIp() {
    return ip;
}

private Integer unitId;

public void setUnitId(Integer unitId) {
    this.unitId = unitId;
}

@Column(name = "unit_id")
public Integer getUnitId() {
    return unitId;
}

private String name;

public void setName(String name) {
    this.name = name;
}

@Column(name = "name")
public String getName() {
    return name;
}

@Column(name = "deleted")
@Temporal(javax.persistence.TemporalType.DATE)
private Date deleted;

public Date getDeleted() {
    return deleted;
}

public void setDeleted(Date deleted) {
    this.deleted = deleted;
}

private List<QPlanService> planServices = new ArrayList<>();

public void setPlanServices(List<QPlanService> planServices) {
    this.planServices = planServices;
}

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
@JoinColumn(name = "ip", insertable = true, nullable = false, updatable = true, referencedColumnName="ip")
@Fetch(FetchMode.SELECT)
public List<QPlanService> getPlanServices() {
    return planServices;
}

qplanservice.java（mysql中的服务到ip表）：

public QPlanService() {}

private Long id;

@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
      return id;
}

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

private QService service;

@OneToOne(targetEntity = QService.class)
public QService getService() {
      return service;
}

public void setService(QService service) {
      this.service = service;
}

private String ip;

@Column(name = "ip", insertable = false, updatable = false)
public String getIp() {
      return ip;
}

public void setIp(String ip) {
      this.ip = ip;
}

为什么会出现这种错误？我认为解决这个问题的办法很简单，但我不明白原因。任何帮助都是好的。