问题:我的日志中出现此异常“基础连接已关闭:发生意外的错误”,并且随机中断[1小时-4小时],这破坏了我们与电子邮件营销系统的OEM集成。
我的网站托管在带有IIS 7.5.7600的Windows Server 2008 R2上。 该网站具有大量的OEM组件和全面的仪表板。 一切与网站的所有其他元素都可以正常使用,但电子邮件营销组件之一除外,我们将其用作仪表板中的iframe解决方案。 它的工作方式是,我发送带有所有凭据的httpWebRequestobject,并得到一个返回的URL,该URL放入iframe中并且可以正常工作。 但它只能工作一段时间[1小时-4小时],然后我得到以下异常“基本连接已关闭:发送时发生意外错误”,即使系统尝试从httpWebRequest获取URL,也是如此由于相同的异常而失败。 使它再次起作用的唯一方法是回收应用程序池或在web.config中编辑任何内容。 我真的筋疲力尽了所有我能想到的选择。
选项尝试
明确添加, keep-alive = false
keep-alive = true
增加了超时时间: <httpRuntime maxRequestLength="2097151" executionTimeout="9999999" enable="true" requestValidationMode="2.0" />
我已将此页面上载到非SSL网站,以检查生产服务器上的SSL证书是否正在建立连接以删除某些方式。
朝着分辨率的任何方向都将受到赞赏。
代码:
Public Function CreateHttpRequestJson(ByVal url) As String
Try
Dim result As String = String.Empty
Dim httpWebRequest = DirectCast(WebRequest.Create("https://api.xxxxxxxxxxx.com/api/v3/externalsession.json"), HttpWebRequest)
httpWebRequest.ContentType = "text/json"
httpWebRequest.Method = "PUT"
httpWebRequest.ContentType = "application/x-www-form-urlencoded"
httpWebRequest.KeepAlive = False
'ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
'TODO change the integratorID to the serviceproviders account Id, useremail
Using streamWriter = New StreamWriter(httpWebRequest.GetRequestStream())
Dim json As String = New JavaScriptSerializer().Serialize(New With { _
Key .Email = useremail, _
Key .Chrome = "None", _
Key .Url = url, _
Key .IntegratorID = userIntegratorID, _
Key .ClientID = clientIdGlobal _
})
'TODO move it to the web.config, Following API Key is holonis accounts API Key
SetBasicAuthHeader(httpWebRequest, holonisApiKey, "")
streamWriter.Write(json)
streamWriter.Flush()
streamWriter.Close()
Dim httpResponse = DirectCast(httpWebRequest.GetResponse(), HttpWebResponse)
Using streamReader = New StreamReader(httpResponse.GetResponseStream())
result = streamReader.ReadToEnd()
result = result.Split(New [Char]() {":"})(2)
result = "https:" & result.Substring(0, result.Length - 2)
End Using
End Using
Me.midFrame.Attributes("src") = result
Catch ex As Exception
objLog.WriteLog("Error:" & ex.Message)
If (ex.Message.ToString().Contains("Invalid Email")) Then
'TODO Show message on UI
ElseIf (ex.Message.ToString().Contains("Email Taken")) Then
'TODO Show message on UI
ElseIf (ex.Message.ToString().Contains("Invalid Access Level")) Then
'TODO Show message on UI
ElseIf (ex.Message.ToString().Contains("Unsafe Password")) Then
'TODO Show message on UI
ElseIf (ex.Message.ToString().Contains("Invalid Password")) Then
'TODO Show message on UI
ElseIf (ex.Message.ToString().Contains("Empty Person Name")) Then
'TODO Show message on UI
End If
End Try
End Function
Public Sub SetBasicAuthHeader(ByVal request As WebRequest, ByVal userName As [String], ByVal userPassword As [String])
Dim authInfo As String = Convert.ToString(userName) & ":" & Convert.ToString(userPassword)
authInfo = Convert.ToBase64String(Encoding.[Default].GetBytes(authInfo))
request.Headers("Authorization") = "Basic " & authInfo
End Sub`
Issue : I get this exception “THE UNDERLYING CONNECTION WAS CLOSED: AN UNEXPECTED ERROR OCCURRED ON A SEND” in my logs and it is breaking our OEM integration with our email marketing system at random times varying from [1hour – 4 hours]My website is hosted on a windows server 2008 R2 with IIS 7.5.7600.This website has a large number of OEM components and comprehensive dashboard.Everything works fine with all the other elements of the website except with one of our email marketing component which we are using as an iframe solution within our dashboard.The way it works is, I send a httpWebRequestobject with all the credentials and i get a url back which i put in an iframe and it works.But it only works for some time [1 hour – 4 hours ]and then i get the below exception “THE UNDERLYING CONNECTION WAS CLOSED: AN UNEXPECTED ERROR OCCURRED ON A SEND” and even if the system tries to get the URL from the httpWebRequest it fails with the same exception.The only way to make it work again is to recycle the application pool or anything is edited in web.config.I am really exhausted all the option that i could think of.Option triedExplicitly added, keep-alive = false
Increased the time out : <httpRuntime maxRequestLength="2097151" executionTimeout="9999999" enable="true" requestValidationMode="2.0" />
I have uploaded this page to a non SSL website to check if the SSL certificate on our production server is making the connection to drop some how.Any direction toward resolution is greatly appreciated.Code :