http请求时偶尔报System.AccessViolationException错，然后导致程序crash

Question

程序在进行http请求时偶尔会遇到下面的错误，导致程序crash，不知道是什么问题引起的，怎么样去修复，谢谢

日志名称:          Application
来源:            .NET Runtime
日期:            2016/3/15 22:19:53
事件 ID:         1026
任务类别:          无
级别:            错误
关键字:           经典
用户:            暂缺
计算机:           iZ11hbel4f2Z
描述:
Application: dah.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
Stack:
   at System.Net.UnsafeNclNativeMethods+OSSOCK.WSAConnect(IntPtr, Byte[], Int32, IntPtr, IntPtr, IntPtr, IntPtr)
   at System.Net.Sockets.Socket.DoConnect(System.Net.EndPoint, System.Net.SocketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean, System.Net.Sockets.Socket, System.Net.Sockets.Socket, System.Net.Sockets.Socket ByRef, System.Net.IPAddress ByRef, ConnectSocketState, System.IAsyncResult, System.Exception ByRef)
   at System.Net.ServicePoint.GetConnection(System.Net.PooledStream, System.Object, Boolean, System.Net.IPAddress ByRef, System.Net.Sockets.Socket ByRef, System.Net.Sockets.Socket ByRef)
   at System.Net.PooledStream.Activate(System.Object, Boolean, System.Net.GeneralAsyncDelegate)
   at System.Net.Connection.CompleteStartConnection(Boolean, System.Net.HttpWebRequest)
   at System.Net.Connection.CompleteStartRequest(Boolean, System.Net.HttpWebRequest, System.Net.TriState)
   at System.Net.Connection.SubmitRequest(System.Net.HttpWebRequest, Boolean)
   at System.Net.ServicePoint.SubmitRequest(System.Net.HttpWebRequest, System.String)
   at System.Net.HttpWebRequest.SubmitRequest(System.Net.ServicePoint)
   at System.Net.HttpWebRequest.GetRequestStream(System.Net.TransportContext ByRef)
   at System.Net.HttpWebRequest.GetRequestStream()
   at CarPlateSHTest.Logical.HttpServer.HttpPost(System.String, System.String)
   at CarPlateSHTest.Logical.WebApi.PostOcrResult(System.String, System.String, System.String, System.String, Int64)
   at CarPlateSHTest.IdCode.ApolloOCR+<>c__DisplayClass3_0.<OCR>b__0()
   at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ThreadHelper.ThreadStart()

事件 Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name=".NET Runtime" />
    <EventID Qualifiers="0">1026</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2016-03-15T14:19:53.000000000Z" />
    <EventRecordID>7585</EventRecordID>
    <Channel>Application</Channel>
    <Computer>iZ11hbel4f2Z</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Application: dah.exe
Framework Version: v4.0.30319
Description: 
The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException

Stack:
   at System.Net.UnsafeNclNativeMethods+OSSOCK.WSAConnect(IntPtr, Byte[], Int32, IntPtr, IntPtr, IntPtr, IntPtr)

 at System.Net.Sockets.Socket.DoConnect(System.Net.EndPoint, System.Net.SocketAddress)
   at
 System.Net.ServicePoint.ConnectSocketInternal(Boolean, System.Net.Sockets.Socket, System.Net.Sockets.Socket, System.Net.Sockets.Socket ByRef, System.Net.IPAddress ByRef, ConnectSocketState, System.IAsyncResult, System.Exception ByRef)
   at System.Net.ServicePoint.GetConnection(System.Net.PooledStream, System.Object, Boolean, System.Net.IPAddress ByRef, System.Net.Sockets.Socket ByRef, System.Net.Sockets.Socket ByRef)
   at System.Net.PooledStream.Activate(System.Object, Boolean, System.Net.GeneralAsyncDelegate)
   at System.Net.Connection.CompleteStartConnection(Boolean, System.Net.HttpWebRequest)
   at System.Net.Connection.CompleteStartRequest(Boolean, System.Net.HttpWebRequest, System.Net.TriState)
   at System.Net.Connection.SubmitRequest(System.Net.HttpWebRequest, Boolean)
   at System.Net.ServicePoint.SubmitRequest(System.Net.HttpWebRequest, System.String)
   at System.Net.HttpWebRequest.SubmitRequest(System.Net.ServicePoint)
   at System.Net.HttpWebRequest.GetRequestStream(System.Net.TransportContext ByRef)
   at System.Net.HttpWebRequest.GetRequestStream()
   at CarPlateSHTest.Logical.HttpServer.HttpPost(System.String, System.String)
   at CarPlateSHTest.Logical.WebApi.PostOcrResult(System.String, System.String, System.String, System.String, Int64)
   at CarPlateSHTest.IdCode.ApolloOCR+&lt;&gt;c__DisplayClass3_0.&lt;OCR&gt;b__0()
   at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ThreadHelper.ThreadStart()
</Data>
  </EventData>
</Event>

  

Answer 1

您好,

上面的错误信息是一个很大概的错误信息，你是使用wcf服务么？如果是的话，你看看配置tracing能不能帮助您找到更多的有用信息.
https://msdn.microsoft.com/zh-cn/library/ms733025%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396 .
另外要是方便的话，你可以给我们一个可以重现你问题的程序么?

Thanks.

---Amy Peng

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