Sorry. The complete stack trace shown on the web page is as follows. I noted
that
 they mirrored what have been logged by Tomcat.

 I was with Tomcat's default config. And I did not persist anything
consciously yet.
How to check if "persistent sessions" are in use in Tomcat? Thanks

I am not sure if "ClassNotFoundException" is misleading somewhat. If really
 "ClassNotFoundException", the same class should still not be found whether
I
 repeat the click slowly or rapidly. But it seems to me that this exception
 appears only when I repeat the click rapidly enough.

 Tomcat version : 1.6.0.18
 java version "1.6.0_07"
 Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
 Java HotSpot(TM) 64-Bit Server VM (build 10.0-b23, mixed mode)


Thank you very much

 Wilfred

 (I later assembled an application with Spring + Freemarker doing similar
 demonstration on the same Tomcat. When I repeatedly clicked "add to cart",
a
 cheese item did go to the cart on each click without breakdown no matter
how
 quickly the repetition was. Weird)

> *****************
> Unexpected RuntimeException
>
> Root cause:
>
> java.lang.ClassNotFoundException: [Lmycheese.Cheese;
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
> at
> org.apache.wicket.application.DefaultClassResolver.resolveClass(DefaultClassResolver.java:103)
> at
> org.apache.wicket.util.io.IObjectStreamFactory$1.resolveClass(IObjectStreamFactory.java:87)
> at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
> at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
> at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1624)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
> 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.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.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.defaultReadFields(ObjectInputStream.java:1947)
> at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:480)
> at org.apache.wicket.Component.readObject(Component.java:4223)
> 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.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 org.apache.wicket.util.lang.Objects.byteArrayToObject(Objects.java:393)
> at
> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.deserializePage(AbstractPageStore.java:228)
> at
> org.apache.wicket.protocol.http.pagestore.DiskPageStore.getPage(DiskPageStore.java:706)
> at
> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.get(SecondLevelCacheSessionStore.java:311)
> at org.apache.wicket.Session.getPage(Session.java:751)
> at
> org.apache.wicket.request.AbstractRequestCycleProcessor.resolveRenderedPage(AbstractRequestCycleProcessor.java:448)
> at
> org.apache.wicket.protocol.http.WebRequestCycleProcessor.resolve(WebRequestCycleProcessor.java:139)
> at org.apache.wicket.RequestCycle.step(RequestCycle.java:1229)
> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349)
> at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
> at
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:199)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
> 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:128)
> 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:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Thread.java:619)
>
> Complete stack:
>
> java.lang.RuntimeException: Could not deserialize object using
> `org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory`
> object factory
> at org.apache.wicket.util.lang.Objects.byteArrayToObject(Objects.java:406)
> at
> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.deserializePage(AbstractPageStore.java:228)
> at
> org.apache.wicket.protocol.http.pagestore.DiskPageStore.getPage(DiskPageStore.java:706)
> at
> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.get(SecondLevelCacheSessionStore.java:311)
> at org.apache.wicket.Session.getPage(Session.java:751)
> at
> org.apache.wicket.request.AbstractRequestCycleProcessor.resolveRenderedPage(AbstractRequestCycleProcessor.java:448)
> at
> org.apache.wicket.protocol.http.WebRequestCycleProcessor.resolve(WebRequestCycleProcessor.java:139)
> at org.apache.wicket.RequestCycle.step(RequestCycle.java:1229)
> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349)
> at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
> at
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)
>
> display page view
>
>
> *****************

jwcarman wrote:
> 
> full stack trace please?  Are you using persistent sessions in tomcat?
> 
> On Sat, Aug 30, 2008 at 7:54 AM, wil2008 <[EMAIL PROTECTED]> wrote:
>>
>> I am new to Wicket (but not new to HTML, Java and Spring).
>> I tried to follow the examples in the ebook of "Wicket in Action".
>> Everything is fine until Chapter 3. I followed the cheese application
>> which
>> demonstrates a plain shopping cart. I compiled and ran the front page
>> successfully (including the Index.html and Index.java, up to page 60). I
>> could "add to cart" and "remove" successfully. So far so good. When I
>> clicked "add to cart" repeatedly and slowly, it was still good. But If I
>> clicked quickly enough, the following bunch of "Unexpected
>> RuntimeException"
>> appeared.
>>
>> I am not sure this is particular to this specific example or is general
>> for
>> other Wicket components.
>> Did I miss something? Does anyone come across something similar?
>> This is important if I am to propose Wicket in a serious project.
>> Thank you very much!
>>
>> Wicket version: 1.3.4
>>
>> <output>
>> Could not deserialize object using
>> `org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory`
>> object factory
>> at
>> org.apache.wicket.util.lang.Objects.byteArrayToObject(Objects.java:411)
>> ........
>> ........
>> Caused by: java.lang.ClassNotFoundException: [Lmycheese.Cheese;
>> at
>> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
>> .............
>> ............
>> </output>
>> --
>> View this message in context:
>> http://www.nabble.com/Clicking-%22add-to-cart%22-repeatedly-tp19232702p19232702.html
>> Sent from the Wicket - User mailing list archive at Nabble.com.
>>
>>
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>> For additional commands, e-mail: [EMAIL PROTECTED]
>>
>>
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
> 
> 
> 

-- 
View this message in context: 
http://www.nabble.com/Clicking-%22add-to-cart%22-repeatedly-tp19232702p19243657.html
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