zoukankan      html  css  js  c++  java
  • The underlying connection was closed: An unexpected error occurred on a receive

    转自:

    http://www.outsystems.com/forums/discussion/15641/tip-the-underlying-connection-was-closed-an-unexpected-error-occurred-on-a-rece/

    Symptom

    You application is making a call to another system performing an HTTP(S) request. This request can be a:

    • Web service call (SOAP or REST)
    • A request to a specific web-page
    • Sending an email
    • ...

    The call is failing and an error occurs in the application. In the Error Log you see an entry similar to (below example is for a SOAP web-reference):

    [1] The underlying connection was closed: An unexpected error occurred on a receive.
       at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
       at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
       at ssCRMApp.WRefPeopleLookup.WRefPeopleLookup.SearchByName(String search)
     
    [2] Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
       at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
       at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
       at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
     
    [3] An existing connection was forcibly closed by the remote host
       at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
     


    Cause
    Errors like these happen because the remote server (to which the call was being made) did not deliver a response to your request and cut the connection before an answer could be sent. Meaning:

    1. Your application (the caller) sent the request
    2. While the application was waiting for the response, the remote server cut the connection.


    Resolution
    Resolving such a problem cannot be done on the caller side (your application) - you need to work with the party that provides the service for you.

    If you are the other party or want to help: common causes on the other side for these errors are:

      • The request is taking too long to run and the server "times it out". If another OutSystems Platform is on the receiving end (meaning: the web call is to an OutSystems Platform) you may want to look here.
      • The remote server is having issues. E.g. application pool recycling or crashes that interrupt logic that may be runnning.
      • A network layer is cutting the network connection half-way. You may see errors in the remote server similar to this one (e.g. "could not flush response);
  • 相关阅读:
    python Database Poll for SQL SERVER
    SQLAlchemy表操作和增删改查
    flask动态url规则
    flask配置管理
    一个Flask运行分析
    Function Set in OPEN CASCADE
    Happy New Year 2016
    Apply Newton Method to Find Extrema in OPEN CASCADE
    OPEN CASCADE Multiple Variable Function
    OPEN CASCADE Gauss Least Square
  • 原文地址:https://www.cnblogs.com/iot1024/p/5013394.html
Copyright © 2011-2022 走看看