Error: 0 - An Existing Connection Was Forcibly Closed By The Remote Host
May 19, 2012
Below error is thrown in a already opened program which connects to different database
A transport-level error has occurred when sending the request to the server.
(provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
Program details: code done using vb.net with MSSQL 2008 as back-end
Two instance of same exe where running simultaneously in same PC but error was thrown only by one instance Program uses both sqlconnection(ADO.NET) and ADODB connection(upgraded from VB6) and the error is thrown by both types of connection. If the error is due to network problem with the server then why few programs work fine? I am not able to trace the reason for this behavior of the program. Can I know why this error occurs and why only in few programs of same instance.
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May 19, 2010
I have a fat VB.NET Winform client that is using the an old asmx style web service. Very often, when I perform query that takes a while or pass a large amt of data to a web service in a dataset, I get the subject error.The error seems to occur in < 1 min, which is far less than the web service timeout value that I have set or the timeout value on the ADO Command object that is performing the query within the web server.It seems to occur whenever I am performing a large query that expects to return a lot of rows or when I am sending up a large amount of data to the web service. For example, it just occurred when I was passing a large dataset to the web server:System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the rem
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Sep 19, 2011
I have an application that copies a file from a network/internet location. I am trying to catch the exception for when the network connection becomes unavailable (or internet goes down). Currently i catch the exception "Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host." which occurs on the bold, underline line below.The issue i have is i try and attempt the operation to continue doing what it was doing by resetting variables and then reassigning them to continue reading the stream but cant get past this error. The only way to go past it is to stop and start the application which is not what im after. [code]
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Aug 5, 2011
I have a tcp server that uses TCPListener and the async method BeginAcceptTCPClient:
Imports System.Net.Sockets
Imports System.Threading
Imports System.Net
Public Class TCPServer
[Code]...
My problem is that infrequently, I get an exception in the HandleAsyncConnection method:"An existing connection was forcibly closed by the remote host" right at the EndAcceptTCPClient method. At this point, the TCPListener seems to stop listening. The problem is that I can't test this easily, as it only happens on a remote test VM and only once every 24 hours or so. If I knew how to recreate the error with a test client, I would be able to figure this out. Wireshark shows a reset [RST] packet being sent at around the time of the exception. So I either need to know how to handle the exception, or how to recreate the problem with a test client.
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Jan 20, 2010
Rather than use an Entry name of an existing VPN connection, is it possible to connect to a remote network by creating a temporary connection on the fly by using the remote IP/Host name, username and password?
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Aug 3, 2011
i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:
ExecuteScalar requires an open and available Connection. The connection's current state is closed.
my code is something like this. I have shown where all i am using ExceuteScalar()
Sub Main()
Try
connection.open()
cmd.ExecuteScalar()
[code]....
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Mar 15, 2009
I have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
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I have a program that sends some data on a networkstream through a tcp connection.
[Code]...
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Sep 25, 2011
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When I call the restful service with the following code, I am getting the error
[Code]...
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Nov 15, 2011
I have the following code that I'm trying to retrieve the HTML document. Not sure why it wouldn't work. Here's what I captured from Live HTTP Headers:
[Code]...
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I'm creating a program (Which will eventually be a service) which loops a section of code which downloads files from a variety of FTP servers.All files are succesfully downloaded on the first iteration, however after this the download fails with the following error..."The underlying connection was closed: An unexpected error occurred on a receive."Curiously, the error does not occur if the loop only downloads the same file from the same Ftp server. It only occurs when 2 or more files are downloaded.I use the following code...
Dim fwr As FtpWebRequest = CType(FtpWebRequest.Create(Supplier.FTP_Address & Supplier.FilePath & Supplier.FromFile), FtpWebRequest)
'Set credentials
fwr.Credentials = New NetworkCredential(Supplier.Username, Supplier.Password)
[code]....
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May 31, 2011
for example i have this code :
Sub Month()
Dim Conn As New Data.OracleClient.OracleConnection
Conn.Open()
Try
Dim Cmd As New Data.OracleClient.OracleCommand
With Cmd
[Code]...
What will happen to the datareader when the Connection is closed ( Conn.close)
Will the Cursor that is used by the datareader be freed ? or will it stay open ?
If the cursor that is used by the datareader is still open , when will it be automatically closed ? or should i just closed it manually ?
Will it cause the dreaded "ORA-01000: maximum open cursors exceeded" ?
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I have a windows service I created that checks for data to post to an off site webservice over SSL. The service checks every 10 seconds for data to send, if there is data it opens a connection to the remote webservice, and closes the connection after 120 seconds (still checking for data to send during this time). The service works fine if a user is RDP'd into the server, but as soon as no one is logged on and the service attempts to push data, I receive the following error:"The underlying connection was closed: An unexpected error occurred on a send."I have tried running the service as a local service, network service, under my login, and under a service account, but nothing seems to work. The PC it is running on is a windows 2003 server (virtualized - vmware)
Protected Overrides Function GetWebRequest(ByVal Uri As Uri) As System.Net.WebRequest Dim oWebrequest As System.Net.HttpWebRequest = MyBase.GetWebRequest(Uri) oWebrequest.KeepAlive = False oWebrequest.ConnectionGroupName = Guid.NewGuid.ToString oWebrequest.ProtocolVersion =
[code]....
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I am using MySQL 5.0 as back end. I am using MySqlData.dll in my project. When i am trying to execute the following code,
Try
Dim cnData As New MySql.Data.MySqlClient.MySqlConnection
Dim lcmd, lcmd1 As New MySql.Data.MySqlClient.MySqlCommand[code]....
I am getting error message as "There is already an OpenDataReader associated with this Connection which must be closed first." I have to use overlapped multiple datareader
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This is my code for dns.hostname ..
vb.net Dim myIPs3 As System.Net.IPHostEntry = Dns.GetHostEntry(hello)
Dim newhost3 As String = myIPs3.HostName
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Try If functionmode = "ADD" Then
[Code]...
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I got this error..The connection was not closed. The connection's current state is open.
This is coding to add data in Ms access in vb...
Imports System.Data.OleDb Public Class Form1
[Code]...
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Public CNN
As SqlConnection
In the Main menu form load:
CNN =
New SqlConnection(sqlConnString)
CNN.Open()
Then when I want to read from the database:
Dim sqlDR
As SqlDataReader
SQL = "SELECT Name FROM Table"
[code]....
When I run the same code without the global CNN, but rather dim the connection inside the Select function, all works well.
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Dim cvLicence As New SQL
Try
cvLicence.upis("INSERT INTO blabla (itsnotimportant) VALUES ('something')")
MsgBox("everything's fine", MsgBoxStyle.Information)
[code]....
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Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
exitwithout()
[code].....
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When I to connect to remote host to retrieve sql record...
it execute to few minute will get his error message... but there is already work perfectly and get connected... it loop it a few record only will occur this error...
"Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host."
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[code]...
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way to retrieve list/rename hiddne files from the remote host. I need to upload the file to a server and then move it to another directory, but the file after being transfered becomes hidden. If I try to rename it any way I get the dreaded 550 in response. I would hate to move to commad line scripting which at the moment seams to be my only option.
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