在重新部署相同应用程序后，在自身上发生ClassCastException

Question

我正在使用Netbeans和Glassfish开发JSF应用程序。当我改变一些东西和Netbeans重新部署到Glassfish，然后一个ClassCastException被抛出在实体类本身。

Caused by: java.lang.ClassCastException: com.twibu.entity.Tipper cannot be cast to com.twibu.entity.Tipper
    at com.twibu.service.TipperService.findByUseridPwd(TipperService.java:22)

这是如何引起的，我该如何解决?

---

作为参考，下面是完整的堆栈跟踪:

WARNING: EJB5184:A system exception occurred during an invocation on EJB TipperService, method: public com.twibu.entity.Tipper com.twibu.service.TipperService.findByUseridPwd(java.lang.String,java.lang.String)
WARNING: javax.ejb.EJBException
    at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215)
    at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113)
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89)
    at com.sun.proxy.$Proxy141.findByUseridPwd(Unknown Source)
    at com.twibu.service.__EJB31_Generated__TipperService__Intf____Bean__.findByUseridPwd(Unknown Source)
    at com.twibu.bean.AuthBean.login(AuthBean.java:122)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:254)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.ClassCastException: com.twibu.entity.Tipper cannot be cast to com.twibu.entity.Tipper
    at com.twibu.service.TipperService.findByUseridPwd(TipperService.java:22)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214)
    ... 44 more

实体:

@Entity
@Table(name = "tipper")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Tipper.findAll", query = "SELECT t FROM Tipper t"),
@NamedQuery(name = "Tipper.findById", query = "SELECT t FROM Tipper t WHERE t.id = :id"),
@NamedQuery(name = "Tipper.findByName", query = "SELECT t FROM Tipper t WHERE t.name = :name"),
@NamedQuery(name = "Tipper.findByUserid", query = "SELECT t FROM Tipper t WHERE t.userid = :userid"),
@NamedQuery(name = "Tipper.findByPwd", query = "SELECT t FROM Tipper t WHERE t.pwd = :pwd"),
@NamedQuery(name = "Tipper.findByEmail", query = "SELECT t FROM Tipper t WHERE t.email = :email")})
@NamedNativeQueries({
@NamedNativeQuery(name = "Tipper.findByUseridPwd", query = "" +
        "SELECT a.id AS id, " +
        "       a.idgruppe AS idgruppe, " +
        "       a.name AS name, " +
        "       a.userid AS userid, " +
        "       a.pwd AS pwd, " +
        "       a.email AS email " +
        "FROM tipper AS a " +
        "WHERE     a.userid = ? " +
        "      AND a.pwd = MD5(?)",
            resultClass=Tipper.class)})
public class Tipper implements Serializable {
    private static final long serialVersionUID = 20130311L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 50)
    @Column(name = "name")
    private String name;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 20)
    @Column(name = "userid")
    private String userid;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 32)
    @Column(name = "pwd")
    private String pwd;
    // @Pattern(regexp="[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?", message="Invalid email")//if the field contains email address consider using this annotation to enforce field validation
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 50)
    @Column(name = "email")
    private String email;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "tipper")
    private Collection<Zulassung> zulassungCollection;
    @JoinColumn(name = "idgruppe", referencedColumnName = "id")
    @ManyToOne(optional = false)
    private Gruppe idgruppe;
    public Tipper() {
    }
    public Tipper(Integer id) {
        this.id = id;
    }
    public Tipper(Integer id, String name, String userid, String pwd, String email) {
        this.id = id;
        this.name = name;
        this.userid = userid;
        this.pwd = pwd;
        this.email = email;
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getUserid() {
        return userid;
    }
    public void setUserid(String userid) {
        this.userid = userid;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    @XmlTransient
    public Collection<Zulassung> getZulassungCollection() {
        return zulassungCollection;
    }
    public void setZulassungCollection(Collection<Zulassung> zulassungCollection) {
        this.zulassungCollection = zulassungCollection;
    }
    public Gruppe getIdgruppe() {
        return idgruppe;
    }
    public void setIdgruppe(Gruppe idgruppe) {
        this.idgruppe = idgruppe;
    }
    public boolean isUser() {
        return idgruppe.getName().equals("user")  ||  idgruppe.getName().equals("admin");
    }
    public boolean isAdmin() {
        return idgruppe.getName().equals("admin");
    }
    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }
    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Tipper)) {
            return false;
        }
        Tipper other = (Tipper) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }
    @Override
    public String toString() {
        return "com.twibu.entity.Tipper[ id=" + id + " ]";
    }
}

这里是服务类:

@Singleton
public class TipperService extends AbstractService {
    public Tipper findByUseridPwd(String userid, String pwd) {
        Query nq = getTwibuManager().createNamedQuery("Tipper.findByUseridPwd");
        nq.setParameter(1, userid);
        nq.setParameter(2, pwd);
        return (Tipper)nq.getSingleResult();
    }
}

Answer 1

似乎旧的应用程序没有被卸载。

如果您没有使用容器管理的持久性单元，那么您需要在取消部署时关闭EntityManagerFactory。