Javax.faces.FacesException

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package br.com.jairo.modelo.bean;

import java.util.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;

/**
 *
 * @author Jairo
 */
@Entity(name="tipos")
public class Tipo {
    private Integer codigo;
    private String nome;
    private List<Conta> contas;

    /**
     * @return the codigo
     */
    @Id
    @GeneratedValue(generator="seqtipo")
    @SequenceGenerator(sequenceName="tipos_codigo_seq",name="seqtipo")
    public Integer getCodigo() {
        return codigo;
    }

    /**
     * @param codigo the codigo to set
     */
    public void setCodigo(Integer codigo) {
        this.codigo = codigo;
    }

    /**
     * @return the nome
     */
    public String getNome() {
        return nome;
    }

    /**
     * @param nome the nome to set
     */
    public void setNome(String nome) {
        this.nome = nome;
    }

    /**
     * @return the contas
     */
    public List<Conta> getContas() {
        return contas;
    }

    /**
     * @param contas the contas to set
     */
    public void setContas(List<Conta> contas) {
        this.contas = contas;
    }
    
}

descrito abaixo como o console do netbeans descreve o erro:

SEVERE: An exception occurred

javax.faces.FacesException: Exception while calling encodeEnd on component : {Component-Path : [Class: org.ajax4jsf.component.AjaxViewRoot,ViewId: /tipo.jsp][Class: com.exadel.htmLib.components.UIDiv,Id: divPrincipal][Class: com.exadel.htmLib.components.UIDiv,Id: j_id_jsp_97046190_2][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: selectTipo]}

at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:610)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:250)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:246)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:246)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:246)

at org.apache.myfaces.application.jsp.JspViewHandlerImpl.actuallyRenderView(JspViewHandlerImpl.java:424)

at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:380)

at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)

at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)

at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:45)

at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:176)

at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)

at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)

at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)

at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:140)

at javax.faces.webapp.FacesServlet.service(FacesServlet.java:152)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:238)

at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:195)

at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:138)

at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:722)