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HomeHomeDNN Open Source...DNN Open Source...Module ForumsModule ForumsGalleryGalleryError in galleryError in gallery
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8/12/2005 8:35 PM
 
Phong Nguyen

Joined: 2/13/2004
Posts: 15

The Gallery only run for couple hours and then it throw an exception "reference to null object" or something else. I have to restart the App. to get it up.

thank you
 
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8/24/2005 3:44 PM
 
Daniel Mettler


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Joined: 3/9/2004
Posts: 16

I've been experiencing the same problem - on about 10 different websites. It's hard to provoke the bug when you want to, but generally when you do you only the shorthand. I recompiled the gallery in debug mode to discover where the bug is. Here is a more detailed output:

Message: DotNetNuke.Services.Exceptions.ModuleLoadException: beim Hinzufügen des Moduls zu ContentPane ist ein Fehler aufgetreten. ---> System.TypeInitializationException: The type initializer for "DotNetNuke.Modules.Gallery.Config" threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Entities.Portals.PortalController.GetCurrentPortalSettings() at DotNetNuke.Modules.Gallery.Config..cctor() in \Web\DesktopModules\Gallery\Components\Configuration\Config.vb:line 848 --- End of inner exception stack trace --- at DotNetNuke.Modules.Gallery.Config.GetGalleryConfig(Int32 ModuleID) at DotNetNuke.Modules.Gallery.Container.Initialize() in \Web\DesktopModules\Gallery\Container.ascx.vb:line 154 at DotNetNuke.Modules.Gallery.Container.Page_Init(Object sender, EventArgs e) in \Web\DesktopModules\Gallery\Container.ascx.vb:line 326 at System.Web.UI.Control.OnInit(EventArgs e) at System.Web.UI.UserControl.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.AddedControl(Control control, Int32 index) at System.Web.UI.ControlCollection.Add(Control child) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) --- End of inner exception stack trace --- 
Something seems to be wrong with this part of the code in the Config.vb

Shared Sub New()

Dim _portalSettings As PortalSettings = PortalController.GetCurrentPortalSettings

'mPortalCssURL = _portalSettings.UploadDirectory & "portal.css"

End Sub

My guess is that for some reason, the PortalController hasn't been created by the time the gallery tries to access it the first time. Maybe some kind of caching? Tam, you have any idea? Because once the bug appears, it doesn't go away. I don't have the solution yet, but maybe somebody else can figure it out before me? If you do, please post!

Thanks, Daniel
 
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8/24/2005 4:47 PM
 
Daniel Mettler


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Posts: 16

I think I'm getting closer, bear with me...

To me it looks like we have the culprit here

Public Shared Function GetGalleryConfig(ByVal ModuleID As Integer) As DotNetNuke.Modules.Gallery.Config

Dim strKey As String = GalleryConfigCacheKeyPrefix & ModuleID.ToString

If DataCache.GetCache(strKey) Is Nothing Then

Dim config As DotNetNuke.Modules.Gallery.Config = New DotNetNuke.Modules.Gallery.Config(ModuleID)

DataCache.SetCache(strKey, config)

End If

Return CType(DataCache.GetCache(strKey), DotNetNuke.Modules.Gallery.Config)

End Function

this is the function inside Config.vb. If I'm not mistaken (I'm better an C# than VB) this is a function that can be called without creating the object first, like a static function in C#. Now it appears that if the settings have not been cached, it gets some settings an caches them. My guess is that somehow sometimes the static function runs kind of "out-of-context" and fails. Whatever causes it to be out of context, seems to persist once it "lost" its context. Probably sometimes when it has a context, things work out untill the cache clears.

Any other ideas?
 
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8/29/2005 1:47 AM
 
Daniel Mettler


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Joined: 3/9/2004
Posts: 16
Did anybody solve this? I still haven't worked it out.
 
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8/30/2005 12:53 PM
 
Carlos Rodriguez

www.almacigo.com
Joined: 6/10/2003
Posts: 615
Daniel:

Take a look at my (very long) post at http://forums.asp.net/1026257/ShowPost.aspx. In it, I attempted to document my experience with the deployment of DNN 3.1.0. and the Gallery v3.0.10. To make the story short and to not rewrite what's in that post, I can tell you that right now, after upgrading to DNN 3.1.1., the Gallery has not crashed any more. It still has some bugs, the buttons in the upper right hand corner of the pop-up work for one album but not another, but the gallery has been running non-stop since 8/24/05 without having to do the login as admin trick. And I did not do any of the code changes mentioned in the current thread.

I do have to mention that I am still using the periodic call to KeepAlive.aspx and the Gallery friendly URL I created. I wrote a very (very) basic screen scraping utility as a VB.Net console app that I use to invoke the sites every 15 minutes.

Hope you find this helpful.

Carlos
 
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