Ciao a tutti ragazzi allora il mio rpblema è il seguente, so che è una domanda stupida:
da un form devo fare una ricerca e mi deve restituire i dati presenti nel db

ma al momento che vado a cliccare mi da questo errore:

Codice PHP:
javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean
at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:4926)         at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4761)         
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1955)         
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1906)         
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:198)         
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)         
at $Proxy340.findByTitolo(Unknown Source)         
at controller.ControllerDao.findByTitolo(ControllerDao.java:34)         
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)         
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)         
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)         at java.lang.reflect.Method.invoke(Method.java:597)         
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:5243)         at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:615)         
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)         
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:567)        
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:157)         
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:139)         
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)         
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)         
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)         at java.lang.reflect.Method.invoke(Method.java:597)         
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:858)         
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:797)         
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:367)         
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5215)         
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5203)         
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:190)         
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)         
at $Proxy341.findByTitolo(Unknown Source)         
at servlet.Find.processRequest(Find.java:44)         
at servlet.Find.doPost(Find.java:80)         
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)         
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)         
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)         
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)         
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)         
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)         
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)         
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)         
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:233)         
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)         at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)         
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)         
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)        
 at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)         
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)         
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)         
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)        
 at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)         at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)        
 at com.sun.grizzly.ContextTask.run(ContextTask.java:69)         
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.IllegalStateException: Query argument titolo not found in the list of parameters provided during query execution.        
 at oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.processParameters(EJBQueryImpl.java:559)         
at oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:329)         
at oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.getResultList(EJBQueryImpl.java:478)         
at session.DivxFacade.findByTitolo(DivxFacade.java:51) 
Il form è:
Codice PHP:
<div id="container_box">
      

 Ricerca un film:</p>
           <form action="Find" id="tit_divx" method="post">
              <input type="text">
              <input type="submit" value="Cerca">
           </form>
</div> 
Il codice nella servlet è:

Codice PHP:
 Divx idDisp = (Divx) controllerDao.findByTitolo();
            request.getParameter("tit_divx");
                if(idDisp != null) {
                    request.getRequestDispatcher("//lista_aggr_cod_disp.jsp").forward(request, response);
                } else {
                    request.getRequestDispatcher("/error.jsp").forward(request, response);
                } 
che richiama il controller

Codice PHP:
public List findByTitolo() {
        return divxFacade.findByTitolo();
    } 
Il session interessato è:
Codice PHP:
    public List<Divx> findByTitolo(){
        return em.createQuery("SELECT d FROM Divx d WHERE d.titolo = :titolo").getResultList();
    } 
E l'entity interessato è:
Codice PHP:
@Entity
@Table(name = "divx")
@NamedQueries({
    @NamedQuery(name = "Divx.findAll", query = "SELECT d FROM Divx d"),
    @NamedQuery(name = "Divx.findByIddivx", query = "SELECT d FROM Divx d WHERE d.iddivx = :iddivx"),
    @NamedQuery(name = "Divx.findByCoddivx", query = "SELECT d FROM Divx d WHERE d.coddivx = :coddivx"),
    @NamedQuery(name = "Divx.findByTitolo", query = "SELECT d FROM Divx d WHERE d.titolo = :titolo"),
    @NamedQuery(name = "Divx.findByAnno", query = "SELECT d FROM Divx d WHERE d.anno = :anno"),
    @NamedQuery(name = "Divx.findByTipoSupporto", query = "SELECT d FROM Divx d WHERE d.tipoSupporto = :tipoSupporto")})
public class Divx implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "Id_divx")
    private Integer iddivx;
    @Basic(optional = false)
    @Column(name = "Cod_divx")
    private String coddivx;
    @Basic(optional = false)
    @Column(name = "Titolo")
    private String titolo;
    @Column(name = "Anno")
    @Temporal(TemporalType.DATE)
    private Date anno;
    @Lob
    @Column(name = "Trama")
    private String trama;
    @Basic(optional = false)
    @Column(name = "TipoSupporto")
    private String tipoSupporto;
    @JoinColumn(name = "Id_genere", referencedColumnName = "Id_genere")
    @ManyToOne
    private Genere idgenere;

    public Divx() {
    }

    public Divx(Integer iddivx) {
        this.iddivx = iddivx;
    }

    public Divx(Integer iddivx, String coddivx, String titolo, String tipoSupporto) {
        this.iddivx = iddivx;
        this.coddivx = coddivx;
        this.titolo = titolo;
        this.tipoSupporto = tipoSupporto;
    }

    // METODI SETTER E GETTER

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (iddivx != null ? iddivx.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 Divx)) {
            return false;
        }
        Divx other = (Divx) object;
        if ((this.iddivx == null && other.iddivx != null) || (this.iddivx != null && !this.iddivx.equals(other.iddivx))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "entities.Divx[iddivx=" + iddivx + "]";
    }

} 
Dove sbaglio?
grazie mille a tutti per l'aiuto siete fantastici