Strange error

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9/30/2010 5:08:13 PM
cagliostro
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Strange error

Hello.

I have this same error, in the same page after the last update. I can't figure out what it could be.

Any ideas ?

Thanks

 

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2010-09-30 09:20:06,915 ERROR mojoPortal.Web.Global - 213.163.97.20-en-US - /massimo-dutti-εκπληκτικό-design-καλή-ποιότητα-σχεδόν-λογικές-τιμές-για-ρούχα.aspx
System.Web.UI.ViewStateException: Invalid viewstate.
    Client IP: 213.163.97.20
    Port: 42103
    Referer: http://www.website.com/massimo-dutti-%CE%B5%CE%BA%CF%80%CE%BB%CE%B7%CE%BA%CF%84%CE%B9%CE%BA%CF%8C-design-%CE%BA%CE%B1%CE%BB%CE%AE-%CF%80%CE%BF%CE%B9%CF%8C%CF%84%CE%B7%CF%84%CE%B1-%CF%83%CF%87%CE%B5%CE%B4%CF%8C%CE%BD-%CE%BB%CE%BF%CE%B3%CE%B9%CE%BA%CE%AD%CF%82-%CF%84%CE%B9%CE%BC%CE%AD%CF%82-%CE%B3%CE%B9%CE%B1-%CF%81%CE%BF%CF%8D%CF%87%CE%B1.aspx
    Path: /Blog/ViewPost.aspx
    User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
    ViewState: 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... ---> System.FormatException: Invalid length for a Base-64 char array.
   at System.Convert.FromBase64String(String s)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   --- End of inner exception stack trace ---
2010-09-30 20:20:09,293 INFO mojoPortal.Web.Global - Global.asax.cs Application_End
2010-09-30 20:20:49,401 INFO mojoPortal.Web.Global - Application Started.
2010-09-30 22:05:39,149 INFO mojoPortal.Web.Global - Global.asax.cs Application_End
2010-09-30 22:06:39,131 INFO mojoPortal.Web.Global - Application Started.
 

10/1/2010 8:09:18 AM
Joe Audette
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Re: Strange error

Hi,

You are experiencing an error in the browser or just seeing this in the logs?

There are lots of things crawling the net that will cause errors like that in your log.

Viewstate errors happen when there is a postback and the viewstate does not match what was originally served.  So the errors can be caused by viewstate tampering. It can also happen if a user has a really slow connection and they click a button before the page is finished loading.

Hope it helps,

Joe

10/1/2010 9:13:53 AM
cagliostro
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Re: Strange error

Hello.

Just in the logs and to that particular post ! Isn't that strange ?

I will keep an eye open and let you know how it goes.

 

Thanks !

10/1/2010 10:21:51 AM
Joe Audette
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Re: Strange error

Seeing errors in the log should not cause great concern if no users are reporting problems. The wild wild web is crawling with mischief that will poke at your site looking for vulnerabilities or trying to cause problems. It is very easy to generate a request that results in an error being logged.

If you see these errors come in with very rapid succession like multiple times per second from the same ip address then it is less likely to be a user with a slow connection and more likely to be a mischievous person or bot. In some cases if I see too much of this kind of thing form a particular ip address I will ban the ip address. If you see it not coming in very fast then it could be a user with a slow connection clicking a button before the page loads completely, but if there are no buttons on the page, then it again seems more likely to be mischief.

In any case this error is causing no harm to your site and is not cause for alarm.

Best,

Joe

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