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List:       tapestry-user
Subject:    Re: T5: timeout exception when using Grid
From:       tapestryphoto <photos () digiatlas ! org>
Date:       2009-01-29 9:20:02
Message-ID: 20090129092002.6ute3l228ogggck8 () webmail ! digiatlas ! org
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Further investigation reveals this is happening due to the page timing  
out and being returned to the pool by the timeout specified by the  
configuration option:

tapestry.page-pool.active-window

(which defaults to 10 minutes)

So it would appear that it's being reset when returned to the pool.  
Unfortunately I'm not very knowledgable about this - even after  
reading the relevant info on page lifecycles. Can someone please shed  
some light on this?

p.


Quoting tapestryphoto <photos@digiatlas.org>:

> 
> Hi!
> 
> I have a form and a grid component on one of my pages (the grid is
> outside the form). All operates normally (using Jetty) unless I leave
> it for 10 minutes. If I then attempt to perform a submit I get the
> Null Pointer Exception listed below. It only happens on pages with the
> grid component.  My Jetty session timeout (in webdefault.xml) is set
> to 30 minutes.
> 
> I'm not quite sure how to proceed in tracking the problem down as the
> error is taking place in Grid. The ten minutes suggests a timeout -
> but where?
> 
> Help appreciated.
> 
> Thanks,
> p.
> 
> 
> java.lang.NullPointerException
> 
> Stack trace
> 
> *
> org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java:112)
>                 
> *
> org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java)
> *
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13$1.run(ComponentPageElementImpl.java:495)
>                 
> *
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:917)
>                 
> *
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$200(ComponentPageElementImpl.java:50)
>                 
> *
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13.render(ComponentPageElementImpl.java:499)
>                 
> *
> org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
> *
> org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:121)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$19.renderMarkup(TapestryModule.java:1200)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$29.renderMarkup(TapestryModule.java:1580)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$28.renderMarkup(TapestryModule.java:1561)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$27.renderMarkup(TapestryModule.java:1543)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$26.renderMarkup(TapestryModule.java:1525)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$25.renderMarkup(TapestryModule.java:1495)
>                 
> *
> org.apache.tapestry5.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:64)
>                 
> *
> org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:57)
>                 
> *
> org.apache.tapestry5.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:59)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$35.handle(TapestryModule.java:1779)
> *
> org.apache.tapestry5.internal.services.PageRenderDispatcher.process(PageRenderDispatcher.java:92)
>                 
> *
> org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:71)
>                 
> *
> org.apache.tapestry5.services.TapestryModule$17.service(TapestryModule.java:1029)
> 
> 
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