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HomeHomeUsing DNN Platf...Using DNN Platf...Performance and...Performance and...Bots Causing Event ErrorsBots Causing Event Errors
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7/30/2014 11:42 AM
 
Nick Wallbridge


Joined: 7/25/2014
Posts: 25

I have been investigating various performance issues (DNN 7.2.1) and have been trying to understand the many messages in the Event Log.  One that I seem unable to stop seems to be caused by a bot (Google). I think that this error may tie up a SQL Connection and over time I see the performance of the site(s) degrade - maybe due to the number of messages ending up in the Event Log?  There are several variations of the message, but all show "UserAgent:Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" An example of the full error message below.

Any advice would be welcome.

Thanks in advance

Nick Wallbridge

 --------------

AssemblyVersion:7.2.1

PortalID:2

PortalName:Endurance GB

UserID:-1

UserName:

ActiveTabID:132

ActiveTabName:Home

RawURL:/main/Register?returnurl=http%253a%252f%252fendurancegb.org%252fmain%252fJoining%252fGetting-Started-with-EGB&popUp=true

AbsoluteURL:/main/Default.aspx

AbsoluteURLReferrer:

UserAgent:Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:72590209-8f98-4ffe-b7b0-5c199f10b444

InnerException:Thread was being aborted.

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:System.Threading.Thread.AbortInternal

StackTrace:

Message:

System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.AbortCurrentThread()
   at DotNetNuke.Modules.Admin.Users.Register.OnInit(EventArgs e)
   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.Control.EnsureChildControls()
   at DotNetNuke.UI.Containers.Container.get_ModuleControl()
   at DotNetNuke.UI.Containers.Container.ProcessModule()
   at DotNetNuke.UI.Skins.Pane.InjectModule(ModuleInfo module)

 

Source:

Server Name: EventScore
 
New Post
7/31/2014 8:28 AM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676
the thread aborted issue appears to be thrown by the database during the process of user registration - typically this means that the operation times out. I suspect you're seeing the spam registration issue that is ongoing - we have fixes for it in 7.3.2 which is due out within a week or so, but I recommend you read http://www.dnnsoftware.com/community-... for workarounds (you may also want to clear out any unexpected users from your site)
Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
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7/31/2014 10:04 AM
 
Nick Wallbridge


Joined: 7/25/2014
Posts: 25

Once again thank you for your quick and relevant reply. It looks like the article you wrote has some possible solutions/improvements for me, although interestingly I don't allow registration on my site at all (it is done by a third part app and a separate DB with some Single-signon processes in the background.) It appears that just the bot hitting the site may (I can't be sure) have been having an impact.  Interestingly the number has dropped off in the last 24 hours, and my site response time is back up.  Again I can't be sure of cause and effect as I have done several other things to try to help. Maybe the hacker's code is clever enough to work out it is not getting anywhere!
 
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8/2/2014 1:53 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676
in general most automated attacks register the http status and if they get a http 200 assume success (and log that to later return e.g. update profile) - where they get a different response (such as causing a 404 or 500 error), they move on assuming that the site is not a valid target. This is annoying, but is a fact of life on the internet where bots run constantly - take a look at your IIS logs sometime and you may be surprised, my personal site get's dozens of php based hack attempts each day. I have a task to create a blog post & wiki discussing this further and outlining how IIS request filtering can be used to reject the invalid requests before they reach the application so as to minimize any performance degradation
Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
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