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POWindows Identity Foundation System.Xml.XmlException: Unexpected end of file
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copied!<p>We have a custom STS along our website both running in Windows Azure. The STS is ASP.NET 4.0 and the site is MVC3. In the past few days I've started seeing quite a few of the following exceptions showing up in our diagnostics logs:</p> <pre> System.Xml.XmlException: Unexpected end of file. at System.Xml.EncodingStreamWrapper.ProcessBuffer(Byte[] buffer, Int32 offset, Int32 count, Encoding encoding) at System.Xml.XmlUTF8TextReader.SetInput(Byte[] buffer, Int32 offset, Int32 count, Encoding encoding, XmlDictionaryReaderQuotas quotas, OnXmlDictionaryReaderClose onClose) at System.Xml.XmlDictionaryReader.CreateTextReader(Byte[] buffer, Int32 offset, Int32 count, Encoding encoding, XmlDictionaryReaderQuotas quotas, OnXmlDictionaryReaderClose onClose) at System.Xml.XmlDictionaryReader.CreateTextReader(Byte[] buffer, Int32 offset, Int32 count, XmlDictionaryReaderQuotas quotas) at Microsoft.IdentityModel.Web.SessionAuthenticationModule.GetKeyId(Byte[] sessionCookie) at Microsoft.IdentityModel.Web.SessionAuthenticationModule.ReadSessionTokenFromCookie(Byte[] sessionCookie) at Microsoft.IdentityModel.Web.SessionAuthenticationModule.TryReadSessionTokenFromCookie(SessionSecurityToken& sessionToken) at Microsoft.IdentityModel.Web.SessionAuthenticationModule.OnAuthenticateRequest(Object sender, EventArgs eventArgs) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously </pre> <p>I don't know if there is any impact to the end user or what problems this may be causing. Would love it if someone could shed some light on this exception and what I might be able to do to prevent it in the future.</p>

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