Request processing failed; nested exception is org.springframework.beans.InvalidPropertyException:

[Manshu Saxena]

hi Great Ranchers,

I am facing a problem. Since last two days I am trying to find out the solution but no luck ...
here is my problem ..

I am using Spring & Hibernate in my application .. It has two options .. (i) add a new Object .. (ii) Edit the Object saved earlier..

Save is successful but while editing object I am getting NullpointerException .. I am not able to figure out the solution .. May you guys please help me .. Exception trace is given below. I googled a lot I found a hint that this's something related to proxy .. but I am not sure how to remove it .. please help.

SEVERE: Servlet.service() for servlet channelconfig threw exception
java.lang.NullPointerException
	at com.channelList.dto.Channel$$FastClassByCGLIB$$e9d87746.invoke(<generated>)
	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
	at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:136)
	at com.channelList.dto.Channel$$EnhancerByCGLIB$$75606945.getChannelDRM(<generated>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:547)
	at org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:447)
	at org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:424)
	at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:641)
	at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:78)
	at org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:587)
	at org.springframework.validation.DataBinder.doBind(DataBinder.java:489)
	at org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:149)
	at org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:110)
	at org.springframework.web.servlet.mvc.BaseCommandController.bindAndValidate(BaseCommandController.java:391)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:263)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.InvalidPropertyException: Invalid property 'channelDRM' of bean class [com.channelList.dto.Channel$$EnhancerByCGLIB$$f6c6cfd5]: Getter for property 'channelDRM' threw exception; nested exception is java.lang.reflect.InvocationTargetException
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:583)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)


root cause 

org.springframework.beans.InvalidPropertyException: Invalid property 'channelDRM' of bean class [com.channelList.dto.Channel$$EnhancerByCGLIB$$f6c6cfd5]: Getter for property 'channelDRM' threw exception; nested exception is java.lang.reflect.InvocationTargetException
	org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:605)
	org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:447)
	org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:424)
	org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:641)
	org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:78)
	org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:587)
	org.springframework.validation.DataBinder.doBind(DataBinder.java:489)
	org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:149)
	org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:110)
	org.springframework.web.servlet.mvc.BaseCommandController.bindAndValidate(BaseCommandController.java:391)
	org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:263)
	org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)


root cause 

java.lang.reflect.InvocationTargetException
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:547)
	org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:447)
	org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:424)
	org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:641)
	org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:78)
	org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:587)
	org.springframework.validation.DataBinder.doBind(DataBinder.java:489)
	org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:149)
	org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:110)
	org.springframework.web.servlet.mvc.BaseCommandController.bindAndValidate(BaseCommandController.java:391)
	org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:263)
	org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)


root cause 

java.lang.NullPointerException
	com.channelList.dto.Channel$$FastClassByCGLIB$$e9d87746.invoke(<generated>)
	net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
	org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:136)
	com.channelList.dto.Channel$$EnhancerByCGLIB$$f6c6cfd5.getChannelDRM(<generated>)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:547)
	org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:447)
	org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:424)
	org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:641)
	org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:78)
	org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:587)
	org.springframework.validation.DataBinder.doBind(DataBinder.java:489)
	org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:149)
	org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:110)
	org.springframework.web.servlet.mvc.BaseCommandController.bindAndValidate(BaseCommandController.java:391)
	org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:263)
	org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

In above trace it's mentioned that channelDRM is not recognized but actually it's placed properly & have proper getter, setters ... Thanks in advance ...

Best Regards,
Manshu

[Manshu Saxena]

No Clue ??

[Mark Spritzler]

You'd have to post some code too.

Your domain object, and the Controller code.

My guess here is more related to your Hibernate stuff that is causing the problem. The whole proxy thing is it could be Hibernate creating that proxy or Spring creating a proxy, or the Binding of the object in the controller. Those are my guesses without seeing any code.

Mark

[Manshu Saxena]

Thanks for your kind reply. below is the required code ...

public class Channel {

	private Integer id;
	private int channelRating;
	private ChannelDRM channelDRM = new ChannelDRM();
	private List<ChannelMetadata> channelMetadataList = LazyList.decorate(
			new ArrayList<ChannelMetadata>(), new InstantiateFactory(
					ChannelMetadata.class));
....................... Getetrs - Setters

Channel.hbm.xml

<hibernate-mapping>
	<class name="com.channelList.dto.Channel"
		table="channels">
		<id name="id" type="integer" column="id">
			<generator class="increment" />
		</id>

		</property>

		<property name="channelRating">
			<column name="channelRating" />
		</property>

		<property name="contentId">
			<column name="contentId" />
		</property>

		<list name="channelMetadataList" cascade="all-delete-orphan">
			<key column="channel_Id" />
			<list-index column="channelMetadata_index" />
			<one-to-many class="com.channelList.dto.ChannelMetadata" />
		</list>

		<many-to-one name="channelDRM" cascade="save-update" class="com.channelList.dto.ChannelDRM" column="channelDRM_id" />

	</class>
</hibernate-mapping>

ChannelMetadata.hbm.xml

<hibernate-mapping>
	<class name="com.channelList.dto.ChannelMetadata"
		table="channelMetadata">
		<id name="id" type="integer" column="id">
			<generator class="increment" />
		</id>
		<property name="channelStreamType">
			<column name="channelStreamType" />
		</property>
		<property name="channelStreamFormat">
			<column name="channelStreamFormat" />
		</property>
		<property name="channelStreamPID">
			<column name="channelStreamPID" />
		</property>
	</class>
</hibernate-mapping>

ChannelDRM.hbm.xml

<hibernate-mapping>
	<class name="com.channelList.dto.ChannelDRM"
		table="channelDRM">
		<id name="id" type="integer" column="id">
			<generator class="increment" />
		</id>
		<property name="channelDRMName">
			<column name="channelDRMName" />
		</property>
		<property name="channelDRMVersion">
			<column name="channelDRMVersion" />
		</property>
	</class>
</hibernate-mapping>

In dispatcher-servlet.xml

	<bean id="channelController" p:channelListManager-ref="channelListManager" p:formView="Channel" p:commandClass="com.channelList.dto.Channel"
		p:commandName="channelCommand" p:validator-ref="channelValidator" class="com.channelList.web.ChannelController">
	</bean>


	<bean id="controllermap1"
		class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/channel.do">channelController</prop>
			</props>
		</property>
	</bean>

ChannelController.java

	@Override
	protected ModelAndView showForm(HttpServletRequest req,
			HttpServletResponse response, BindException bindException)
			throws Exception {
		// TODO Auto-generated method stub

		Map<String, Object> model = new HashMap<String, Object>();
		model.put("action", "channel.do");
		model.put("comamndName", getCommandName());
		
		return super.showForm(req, response, bindException, model); 
	}

	@Override
	protected Object formBackingObject(HttpServletRequest request)
			throws Exception {
		// TODO Auto-generated method stub
		int channelId = 0;
		if (request.getParameter("channelId") != null)
			channelId = Integer.parseInt(request.getParameter("channelId"));
		Channel channel = channelListManager.getChannel(channelId);
		return channel;
	}

In Channel.jsp

      <form:form method="POST" action="${action}" cssClass="formData" commandName="${comamndName}">
                <form:input   id="channel_drm_version"  path="channelDRM.channelDRMVersion" />
                <form:input  id="channel_stream_type" path="channelMetadataList[${listIndex}].channelStreamType" />

               ........................... Others ........................
        </form:form>

Best Regards,
Manshu

[Mark Spritzler]

In your hibernate mapping for Channel you have

<property name="contentId">  
            <column name="contentId" />  
        </property> 

I don't see that property in your Channel class.

Also in that mapping you have </property> all by itself.

That would cause an InvalidProperyException. If there is no property in the class, but you have it in your mapping.

Mark

[Manshu Saxena]

Actually the property is there .. I did not write as because that's not related to my problem, and I did not want to confuse you ... please see the below code ...

public class Channel {  
  
    private Integer id;  
    private int channelRating;  
    private String contentId;
    private ChannelDRM channelDRM = new ChannelDRM();  
    private List<ChannelMetadata> channelMetadataList = LazyList.decorate(  
            new ArrayList<ChannelMetadata>(), new InstantiateFactory(  
                    ChannelMetadata.class));  
....................... Getetrs - Setters  

Best Regards
Manish

[Manshu Saxena]

Please let me know in case something is confusing..

Best Regards
Manish

[Mark Spritzler]

OK, yeah not having code in your post means we don't see everything and easy to not see something that isn't there.

So in your error it is saying there is a problem calling getChannelDRM method.

Do you have such a getter method, or something similar. Can you post your getters and setters? By default Hibernate .xml mapping use getters and setters to get and set values from the database to your domain object. If you don't have them, then you get this type of error.

Hope that is it.

Mark