Thanks for the tips, I turn on "Honor transient" and finally my webapp
startup successfully.
after playing some pages and I switch from one server to another server.
I encounter another exception caused by transient:
WicketMessage: unable to get object, model: Model:classname=[
wicket.feedback.FeedbackMessagesModel]:attached=true, called with component
[MarkupContainer [Component id = messages, page =
ngc.wicket.pages.MainPage, path = 7:globalFeedback:feedbackul:
messages.FeedbackPanel$MessageListView, isVisible = true, isVersioned =
false]]
Root cause:
java.lang.NullPointerException
at wicket.util.concurrent.CopyOnWriteArrayList.size (
CopyOnWriteArrayList.java:152)
at wicket.feedback.FeedbackMessages.messages(FeedbackMessages.java:258)
at wicket.feedback.FeedbackMessagesModel.onGetObject(
FeedbackMessagesModel.java:101)
at wicket.model.AbstractDetachableModel.getObject (
AbstractDetachableModel.java:104)
at wicket.Component.getModelObject(Component.java:990)
at wicket.markup.html.panel.FeedbackPanel.updateFeedback(FeedbackPanel.java
:234)
at wicket.Page$2.component (Page.java:372)
at wicket.MarkupContainer.visitChildren(MarkupContainer.java:744)
at wicket.Page.renderPage(Page.java:368)
.....
by default feedbackMessages utilize
wicket.util.concurrent.CopyOnWriteArrayList . But it internally use an
transient Object[] array_ without checking null and lazy initialization.
anyway, I may try simpler wicket application for evaluating terracotta...
It's hard to figure out what's going on for deep objects graph.
On 12/5/06, Johan Compagner <[EMAIL PROTECTED]> wrote:
is the option that transient fields must be left alone (not serialized) on
by default?
johan
On 12/5/06, Ingram Chen < [EMAIL PROTECTED]> wrote:
>
> hhmm.... as Wicket always check serializable, I think my app's session
> does not refererence to non-serializable WebApplication. but the stack
> trace shows:
>
>
com.tc.object.ClientObjectManagerImpl.lookupOrCreate(ClientObjectManagerImpl.java
> :306)
>
com.tc.object.tx.ClientTransactionManagerImpl.fieldChanged(ClientTransactionManagerImpl.java:507)
> com.tc.object.TCObjectImpl.objectFieldChanged
>
> (TCObjectImpl.java:272)
> wicket.Session.__tc_setsessionStore(
> Session.java)
> wicket.Session.getSessionStore(Session.java:900)
> wicket.Session.getAttributeNames(Session.java:881)
> wicket.Session.visitPageMaps
>
> (Session.java:753)
> wicket.Session.init(Session.java:581)
> wicket.RequestCycle.prepare
> (RequestCycle.java:911)
> wicket.RequestCycle.step(RequestCycle.java:986)
> wicket.RequestCycle.steps(RequestCycle.java
> :1084)
>
> wicket.RequestCycle.request(RequestCycle.java:454)
> wicket.protocol.http.WicketServlet.doGet
> (WicketServlet.java:219)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>
> I use Wicket 1.2.3 so Session.java:900 is
>
> public class Session {
>
> protected ISessionStore getSessionStore()
> {
> if (sessionStore == null)
> {
> sessionStore = getApplication().getSessionStore(); // line
> no 900
> }
> return sessionStore;
> }
> }
>
> it looks like terracotta intercept assignment "sessionStore = " and add
> a setter
>
> wicket.Session.__tc_setsessionStore(Session.java)
>
> but sessionStore referenced by Application....
>
>
> On 12/5/06, Eelco Hillenius < [EMAIL PROTECTED] > wrote:
> >
> > Why would you put a reference to the application in your session
> > anyway? You can get the current app like Application.get(). Otherwise,
> > you can make the field transient, though when it gets deserialized,
> > you'd have to set the field yourself somehow.
> >
> > Eelco
> >
> >
> > On 12/4/06, Ingram Chen < [EMAIL PROTECTED]> wrote:
> > > I just test terracotta-session, but it report error:
> > >
> > >
> > > com.tc.exception.TCNonPortableObjectError:
> > >
> >
*******************************************************************************
> >
> > > Attempt to share an instance of a non-portable class referenced by a
> > > portable class. This
> > > unshareable class is a subclass of a JVM- or host machine-specific
> > resource.
> > > Please either
> > > modify the class hierarchy or ensure that instances of this class
> > don't
> > > enter the shared object
> > > graph.
> > >
> > > Referring class : com.myapp.MyWebApplication
> > > Referring field :
> > > wicket.protocol.http.WebApplication.wicketServlet
> > > Thread : http-9081-Processor3
> > > JVM ID : VM(0)
> > > Unshareable superclass names: javax.servlet.GenericServlet
> > >
> >
*******************************************************************************
> > >
> > > It seems that I can't store any WebApplication reference in
> > session...
> > >
> > >
> > >
> > > On 12/5/06, [EMAIL PROTECTED] < [EMAIL PROTECTED] >
> > wrote:
> > > > Hi,
> > > >
> > > > I also have just tested terracotta with my springframework /
> > wicket
> > > application.
> > > > It works perfect. I think, that teracotta meets wicket needs for
> > parallel
> > > and
> > > > loadbalanced execution envoronement the way we are looking for.
> > > >
> > > > Maciej
> > > >
> > > > > -----Ursprüngliche Nachricht-----
> > > > > Von: [email protected]
> > > > > Gesendet: 04.12.06 20:50:41
> > > > > An: "Wicket User List" <
> > > [email protected] >
> > > > > Betreff: [Wicket-user] Terracotta open source and tested with
> > > wicket-examples
> > > >
> > > >
> > > > > Hi all,
> > > > >
> > > > > Sorry to spam you with this, but you might be interested in this
> > > > > announcement
> > > http://www.infoq.com/news/2006/12/terracotta-jvm-clustering.
> > > > > We successfully tested wicket-examples (with the help of some
> > people
> > > > > from Terracotta), and it looks like Terracotta is very promising
> >
> > > > > indeed - certainly now that it is open sourced!
> > > > >
> > > > > Anyway, just FYI, and I'd be interested to learn the experiences
> > of
> > > others.
> > > > >
> > > > > Eelco
> > > > >
> > > > >
> > >
> > -------------------------------------------------------------------------
> > > > > Take Surveys. Earn Cash. Influence the Future of IT
> > > > > Join SourceForge.net 's Techsay panel and you'll get the chance
> > to share
> > > your
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> > >
> > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
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> > > > > [email protected]
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> > > https://lists.sourceforge.net/lists/listinfo/wicket-user
> > > > >
> > > >
> > > > --
> > > > mfG
> > > >
> > > > Bednarz, Hannover
> > > >
> > > >
> > >
> > -------------------------------------------------------------------------
> > > > Take Surveys. Earn Cash. Influence the Future of IT
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> > >
> > >
> > >
> > > --
> > > Ingram Chen
> > > Java [EMAIL PROTECTED]
> > > Institue of BioMedical Sciences Academia Sinica Taiwan
> > > blog: http://www.javaworld.com.tw/roller/page/ingramchen
> > >
> > -------------------------------------------------------------------------
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> >
> > >
> > > _______________________________________________
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> > > [email protected]
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> > >
> > >
> > >
> >
> >
> > -------------------------------------------------------------------------
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>
>
>
> --
> Ingram Chen
> Java [EMAIL PROTECTED]
> Institue of BioMedical Sciences Academia Sinica Taiwan
> blog: http://www.javaworld.com.tw/roller/page/ingramchen
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share
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> opinions on IT & business topics through brief surveys - and earn cash
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>
>
>
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your
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--
Ingram Chen
Java [EMAIL PROTECTED]
Institue of BioMedical Sciences Academia Sinica Taiwan
blog: http://www.javaworld.com.tw/roller/page/ingramchen
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