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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Help! - 4.4.1 Upgrade Errors on Production Web FarmHelp! - 4.4.1 Upgrade Errors on Production Web Farm
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2/27/2007 10:55 AM
 
April Spence


devcentral.f5.com
Joined: 11/4/2005
Posts: 562

Upgraded from 4.0.3 to 4.4.1 last night.  We run DNN on a web farm, seemed like one of the other servers was getting these errors intermittantly, we took it down to one server and now we're getting fewer errors, but it's still happening.  Refreshing the browser a few times seems to cure it for a moment.

Help!

AssemblyVersion: 04.04.01
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL: /NewRVShowroom/Winnebago/tabid/1846/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.lamesarv.com/NewRVShowroom/Winnebago/tabid/1846/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 39bd2c9c-bb9e-4b46-ac10-e48a655bbafe
InnerException: Unhandled Error:
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.ThrowHelper.ThrowInvalidOperationException
StackTrace:
Message: System.Exception: Unhandled Error: ---> System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at System.Collections.Generic.Dictionary`2.Enumerator.MoveNext() at DotNetNuke.Entities.Tabs.TabController.GetTab(Int32 TabId, Int32 PortalId, Boolean ignoreCache) at DotNetNuke.Entities.Portals.PortalSettings.GetPortalByTab(Int32 TabID, String PortalAlias) at DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---
Source:
Server Name: WEBMAIL


Steven Webster
Manager, Community Platform
F5 Networks, DevCentral
 
New Post
2/27/2007 4:23 PM
 
April Spence


devcentral.f5.com
Joined: 11/4/2005
Posts: 562

We've been running like this on one server all day.  I'm beginning to suspect the cache settings.  Its still happening, but seems to be more often related to edits to the site when logged in as admin or host.  Here are the current performance seetings.

 

I've been deperately searching for recommendations on settings but can't seem to find anything.  Again, we're down to one server in the web farm and want to resolve this issue and bring the other servers back online.

What has been  really eye opening is that even with just the one web server, the performance today has been amazing.  The web server is running around 40% processor on average (was running at 80%+ on 4.0.3) and most impressive is that the SQL Server (seperate machine) is running at 10% processor (instead of 80% - 90%).  We're running faster with a smaller footprint on fewer machines by moving to 4.4.1.  Once this issue is resolved we can breath again and really fly. 


Steven Webster
Manager, Community Platform
F5 Networks, DevCentral
 
New Post
2/27/2007 6:16 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676

Have you read the webfarm document @ http://www.dotnetnuke.com/About/Documentation/ProjectDocuments/tabid/478/Default.aspx . I notice it hasn't been updated for the new 4.4+ settings, but I believe that you should be using disk to store cache, as the webfarm setup will then syncronise the disk cache across all the webfarms, whereas memory storage is localised to the server itself.

Good to hear that 4.4.1 has had such a performance boost for you.

Cathal

Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
New Post
2/27/2007 6:20 PM
 
April Spence


devcentral.f5.com
Joined: 11/4/2005
Posts: 562
Yes, we're familiar with that doc.  Let me look into that.

Steven Webster
Manager, Community Platform
F5 Networks, DevCentral
 
New Post
2/27/2007 6:26 PM
 
April Spence


devcentral.f5.com
Joined: 11/4/2005
Posts: 562

I switched it but no change.  Thanks for the idea.  I have another thread on this same subject started in the Benefactor section.    Don't want to post in the wrong place.

Any other ideas? 


Steven Webster
Manager, Community Platform
F5 Networks, DevCentral
 
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