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SEVERE: javax.faces.FacesException: java.lang.ClassCastException:

Greenhorn

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posted 13 years ago

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I'm using NetBeans 6.9.1, PrimeFaces 2.2RC1, JSF2, whatever Glassfish that comes w/ 6.9.1.

I'm trying to get past this error and cannot figure it out despite multiple internet searches on the topic.

Below are the code samples:
JSF2:

<ui:composition template="/template.xhtml">
        <ui:define name="title">
            <h:outputText value="ui:define..."></h:outputText>
        </ui:define>
        <ui:define name="body">
            <h:form id="form1" >
                <h:panelGroup id="messagePanel" layout="block">
                    <p:growl id="growl" showDetail="true" />
                </h:panelGroup>
                <h:panelGroup>
                    <p:dataTable id="ptDataTable" var="pt" value="#{patientsManagedBean.lazyPatients}"
                                 paginator="true" rows="10" lazy="true" dynamic="true"
                                 paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
                                 rowsPerPageTemplate="50,100,200"
                                 selection="#{patientsManagedBean.selected}" selectionMode="single"
                                 onRowSelectComplete="ptDialog.show()" onRowSelectUpdate="display growl ptDialog"
                                 rowSelectListener="#{patientsManagedBean.onRowSelect}"
                                 rowUnselectListener="#{patientsManagedBean.onRowUnselect}"
                                 onRowUnselectUpdate="growl" >
                        <f:facet name="header">
                            Displaying "#{patientsManagedBean.ptFacade.count()}" Patients...
                        </f:facet>

<p:column headerText="PatientID">
                            <h:outputText value="#{pt.patientID}"/>
                        </p:column>

<p:column headerText="PatientFileID">
                            <h:outputText value="#{pt.patientFileID}"/>
                        </p:column>

<p:column headerText="Patient Name">
                            <h:outputText value="#{pt.fullname}"/>
                        </p:column>

<p:column headerText="DOB">
                            <h:outputText value="#{pt.dob}"  >
                                <f:convertDateTime dateStyle="medium"/>
                            </h:outputText>
                        </p:column>

<p:column headerText="Race">
                            <h:outputText value="#{pt.raceId}"/>
                        </p:column>

<p:column headerText="DOD">
                            <h:outputText value="#{pt.dod}" rendered="#{pt.dod > pt.dob}">
                                <f:convertDateTime dateStyle="medium"/>
                            </h:outputText>
                        </p:column>

</p:dataTable>
                </h:panelGroup>

<p:dialog header="Patient Dialog" widgetVar="ptDialog" resizable="false"
                          showEffect="explode" hideEffect="explode">
                    <h:panelGrid id="display" columns="2" cellpadding="4">
                        <f:facet name="header">
                        </f:facet>
                        <h:outputText value="Patient Name: "/>
                        <h:outputText value="#{patientsManagedBean.selected.fullname}"/>

</h:panelGrid>
                </p:dialog>
            </h:form>
        </ui:define>
    </ui:composition>
</html>

ManagedBeanCode:

package MBeans;

imports .....

@ManagedBean
@ViewScoped
public class PatientsManagedBean implements Serializable {

@EJB
    public PatientsFacade ptFacade;
    public Patients selected, item;
    public LazyDataModel<Patients> lazyPatients;

public PatientsManagedBean() {
        System.out.println("PatientsManagedBean constructed");
    }

@PostConstruct
    public void constructManagedBean() {
        System.out.println("@PostConstructeManagedBean");

lazyPatients = new LazyDataModel<Patients>() {
            @Override
            public List<Patients> load(int first, int pageSize, String sortField,
                    boolean sortOrder, Map<String, String> filters) {
                System.out.println("public List<Pt> load called");

lazyPatients.setRowCount(ptFacade.count());               
                System.out.println(lazyPatients.getRowCount() + " patients found");
                System.out.println("First: " + first + "; PageSize: " + pageSize);
                return ptFacade.findRange(first, pageSize);
            }
        };
    }

public void onRowSelect(SelectEvent event) {
        FacesMessage msg = new FacesMessage("Patient Selected",
                ((Patients) event.getObject()).getFullname());
        FacesContext.getCurrentInstance().addMessage(null, msg);
        //System.out.println(msg);
    }

public void onRowUnselect(UnselectEvent event) {
        FacesMessage msg = new FacesMessage("Patient Unselected",
                ((Patients) event.getObject()).getFullname());
        FacesContext.getCurrentInstance().addMessage(null, msg);
        //System.out.println(msg);
    }

public Patients getItem() {
        return item;
    }

public void setItem(Patients item) {
        this.item = item;
    }

public LazyDataModel<Patients> getLazyPatients() {
        return lazyPatients;
    }

public void setLazyPatients(LazyDataModel<Patients> lazyPatients) {
        this.lazyPatients = lazyPatients;
    }

public PatientsFacade getPtFacade() {
        return ptFacade;
    }

public void setPtFacade(PatientsFacade ptFacade) {
        this.ptFacade = ptFacade;
    }

public Patients getSelected() {
        return selected;
    }

public void setSelected(Patients selected) {
        this.selected = selected;
        System.out.println(selected.getPatientFileID() + " setSelected");
    }

@FacesConverter(forClass = Patients.class)
    public static class PatientsControllerConverter implements Converter {

@Override
        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
            if (value == null || value.length() == 0) {
                return null;
            }
            PatientsManagedBean controller = (PatientsManagedBean) facesContext.getApplication().getELResolver().
                    getValue(facesContext.getELContext(), null, "patientsManagedBean");
            return controller.ptFacade.find(getKey(value));
        }

java.lang.String getKey(String value) {
            java.lang.String key;
            key = value;
            return key;
        }

String getStringKey(java.lang.String value) {
            StringBuilder sb = new StringBuilder();
            sb.append(value);
            return sb.toString();
        }

@Override
        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
            if (object == null) {
                return null;
            }
            if (object instanceof Patients) {
                Patients o = (Patients) object;
                return getStringKey(o.getPatientID());
            } else {
                throw new IllegalArgumentException("object " + object + " is of type " + object.getClass().getName() + "; expected type: " + PatientsManagedBean.class.getName());
            }
        }
    }
}

Error Message from the GlassFish server:

INFO: PatientsManagedBean constructed
INFO: @PostConstructeManagedBean
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: EclipseLink, version: Eclipse Persistence Services - 2.0.1.v20100213-r6600
INFO: file:/C:/wamp/www/QIP1a.1/build/web/WEB-INF/classes/_QIP1a.1PU login successful
INFO: public List<Pt> load called
INFO: 8772 patients found
INFO: First: 0; PageSize: 10
SEVERE: javax.faces.FacesException: java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to com.sun.faces.application.view.StateHolderSaver
        at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:1256)
        at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:672)
        at com.sun.faces.application.view.StateManagementStrategyImpl.restoreView(StateManagementStrategyImpl.java:284)
        at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:177)
        at com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:131)
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:430)
        at com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:143)
        at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:199)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:110)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
        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:325)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
        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.ClassCastException: [Ljava.lang.Object; cannot be cast to com.sun.faces.application.view.StateHolderSaver
        at com.sun.faces.application.view.StateManagementStrategyImpl$4.invokeContextCallback(StateManagementStrategyImpl.java:288)
        at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:1253)
        ... 35 more

The web page shows 10 patients initially. Checking the server log, the 8772 patients are documented in the System.out.println (this is correct). This also is the first page w/ first = 0 and pagesize = 10. Error comes when I either click an entry or I click the next button on the paginator.

If I 'redeploy' the app w/o any changes, the server log shows the following error messages w/o my interacting w/ the app at all:

INFO: file:/C:/wamp/www/QIP1a.1/build/web/WEB-INF/classes/_QIP1a.1PU logout successful
INFO: Portable JNDI names for EJB PatientsFacade : [java:global/QIP1a.1/PatientsFacade!Facades.PatientsFacade, java:global/QIP1a.1/PatientsFacade]
INFO: Portable JNDI names for EJB ICDFacade : [java:global/QIP1a.1/ICDFacade, java:global/QIP1a.1/ICDFacade!Facades.ICDFacade]
INFO: Portable JNDI names for EJB CPTFacade : [java:global/QIP1a.1/CPTFacade!Facades.CPTFacade, java:global/QIP1a.1/CPTFacade]
INFO: Portable JNDI names for EJB SurgeryFacade : [java:global/QIP1a.1/SurgeryFacade, java:global/QIP1a.1/SurgeryFacade!Facades.SurgeryFacade]
INFO: Initializing Mojarra 2.0.2 (FCS b10) for context '/QIP1a.1'
WARNING: WEB0517: Unable to restore sessions for web module [/QIP1a.1] from previous deployment
java.lang.NullPointerException
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate$SerializableLocalObjectDelegate.createObject(EJBLocalObjectInvocationHandlerDelegate.java:154)
        at com.sun.ejb.containers.JavaEEObjectStreamHandlerForEJBs.resolveObject(JavaEEObjectStreamHandlerForEJBs.java:76)
        at com.sun.enterprise.container.common.spi.util.JavaEEObjectInputStream.resolveObject(JavaEEObjectInputStream.java:72)
        at java.io.ObjectInputStream.checkResolve(ObjectInputStream.java:1377)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at java.util.HashMap.readObject(HashMap.java:1030)
        at sun.reflect.GeneratedMethodAccessor252.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at java.util.HashMap.readObject(HashMap.java:1030)
        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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at java.util.HashMap.readObject(HashMap.java:1030)
        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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at java.util.HashMap.readObject(HashMap.java:1030)
        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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at org.apache.catalina.session.StandardSession.readRemainingObject(StandardSession.java:1818)
        at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1750)
        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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at org.apache.catalina.session.StandardSession.deserialize(StandardSession.java:1063)
        at org.apache.catalina.session.StandardManager.readSessions(StandardManager.java:511)
        at com.sun.enterprise.web.WebModule.loadSessions(WebModule.java:1557)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1949)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1619)
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:90)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:236)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:339)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:310)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1121)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
        at org.glassfish.deployment.admin.ReDeployCommand.execute(ReDeployCommand.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
        at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
        at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
        at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
        at java.lang.Thread.run(Thread.java:619)

INFO: Loading application QIP1a.1 at /QIP1a.1
INFO: QIP1a.1 was successfully deployed in 10,993 milliseconds.

Any help/ideas would be appreciated. I've not been able to determine what is causing the null pointer exception that shows w/ redeployment...

Thanks in advance...

Ilari Moilanen

Ranch Hand

Posts: 199

posted 13 years ago

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The null pointer originates very likely from the fact that the first deployment did not manage to work without errors. One hint for that is in the error message itself "Unable to restore sessions for web module [/QIP1a.1] from previous deployment" which means that the error occurred when GlassFish is getting serialized data from the disk that it presumes is correctly saved and accessible.

The first exception on the other hand is not so clear. Maybe you use incompatible classes for the data. You can try to pin down where the error is by making the code simpler. First of all make the class @RequestScoped instead of @ViewScoped and remove the "implements Serializable". I am new to JSF but I have already found out that the @ViewScoped can be problematic. And remove all the unnecessary code from the xhtml page (including template using and so on).