TFS 2010 Build’s fail to GET files larger than 2MB

You might find that in TFS 2010 your builds fail whever they attempt to GET a file over 2MB in size. This ocurrs if you’re using IIS7.5 (on Windows Server 2008 R2) and is in fact another IIS bug, and not a TFS 2010 Problem.

This issue occurs because the idle connection time-out for the HTTP service expires prematurely. This causes the network connection to disconnect unexpectedly. You will get a message through Visual Studio informing you which files failed to download. Usually with this error message:

Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host

To solve this issue, you’ll need to install a patch on one (or all) of your Application Tier Servers. The patch and conditions for install can be found here

http://support.microsoft.com/kb/981898

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