André Krijnen


There was an error in the callback content and structure

by on Jun.16, 2011, under iis, Internet Information Services, SharePoint 2010, SharePoint Foundation

I ran today in this message in the SiteManager.aspx of SharePoint Server 2010: there was an error in the callback content and structure

So allright, I checked the search engines and did find some answers regarding this problem, but you know what. When restart your IIS server on your Web Front End the message doesn’t go away. Hmm odd, how could that be, well I figured out that it does a call back to another server, in my case it was one of the other SharePoint Servers in the farm. After resetting this server it removes the message and everything works fine again.

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W3SVC Deadlock Detected by Debug.Assert in ASP.NET 2.0

by on Nov.25, 2010, under ASP.NET 2.0, iis, Programming, W3SVC

After a hard day with some errors failing a production server at a customer I had to find out what caused all these troubles… Well I had alot of messages in the Application Log with the messages ViewState verification failed… what’s causing all these messages? Well I had to find it out… So after some research it could be alot of things that causing these messages, but I couldn’t find out which one it was…

Till I found another error message in the System Log… these messages caused a Deadlock on the Thread, and if this happens IIS will create a new Thread that will continue, but after 20 deadlocks IIS went down… hmm odd, so I found out that this came from the application. And it came from the System.Diagnostics.Debug.Assert, but huh, I thought that I had delivered a Release version. Well maybe, maybe not. So I knew for some reason this was causing all these messages.

Well I thought that I could kill these messages by setting debug=”false”, well I can assure you, that won’t work. I had that figured out the next day, when the Administrator called me that the production server went down every 5 to 10 minutes… hmm so I called Edward Bakker, and asked him if he had a solution. After some talking with each other and Internet by hand I searched and came out by the blog of Scott Hanselman. And he had the solution for my problem.

This problem can cause severe damage and it seems to be a bug in ASP.NET 2.0… Thanks to Scott and Edward I managed to figure it out.

Link to blogpost by Scott Hanselman:

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