IOException in Put over certain file size

Question

Hi, i have been successfully using this FTP object for some time but have found that i am consistantly getting the following error if the file being sent is over 10MB.

IOException in Put(string,string,bool) : System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

I can send the same file using WS_FTP for example with no issues.

Is there a limit on the free version?

Here are some of the configuration settings i have..

ftpClient.RemoteHost = ftpSite;
ftpClient.ConnectMode = EnterpriseDT.Net.Ftp.FTPConnectMode.PASV;
ftpClient.CloseStreamsAfterTransfer = true;
ftpClient.SynchronizePassiveConnections = true;
ftpClient.Connect();
ftpClient.User(ftpUsername);
ftpClient.Password(ftpPassword);
ftpClient.TransferType = EnterpriseDT.Net.Ftp.FTPTransferType.BINARY;
ftpClient.BytesTransferred += new EnterpriseDT.Net.Ftp.BytesTransferredHandler(BytesTransferred);

Cheers
Grant.

Answer 1

There's no limit on the free version. With large file failures the commonest problem is the server timing out the client. Post a small segment of the log file that shows the failure & we'll take a look.

Answer 2

Hi Bruce, here are two logs, one that works followed by the one that fails..

WORKS
=====

DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.332 : Setting socket timeout=120000
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.332 : Command encoding=System.Text.ASCIIEncoding
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.347 : StrictReturnCodes=False
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220---------- Welcome to Pure-FTPd [TLS] ----------
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220-You are user number 1 of 50 allowed.
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220-Local time is now 09:36. Server port: 21.
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220-This is a private system - No anonymous login
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220-IPv6 connections are also welcome on this server.
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : 220 You will be disconnected after 15 minutes of inactivity.
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.363 : ---> USER x
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.378 : 331 User x OK. Password required
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.378 : ---> PASS ********
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.441 : 230-User xnhas group access to: x
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.441 : 230 OK. Current restricted directory is /
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.550 : ---> TYPE I
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.550 : 200 TYPE is now 8-bit binary
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.566 : ---> PASV
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.566 : 227 Entering Passive Mode (117,58,251,10,106,83)
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.566 : Server supplied address=117.58.251.10
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.566 : Server supplied port=27219
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.566 : NewPassiveDataSocket(117.58.251.10,27219)
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.582 : ---> STOR /public_html/x.rar
DEBUG [FTPControlSocket] 9 Dec 2008 01:38:56.613 : 150 Accepted data connection
DEBUG [FTPClient] 9 Dec 2008 01:39:28.707 : Closing source stream
DEBUG [FTPClient] 9 Dec 2008 01:39:28.738 : Transferred 4574636 bytes to remote host
DEBUG [FTPControlSocket] 9 Dec 2008 01:39:28.785 : 226-File successfully transferred
DEBUG [FTPControlSocket] 9 Dec 2008 01:39:28.785 : 226 32.174 seconds (measured here), 138.85 Kbytes per second
DEBUG [FTPControlSocket] 9 Dec 2008 01:39:28.816 : ---> QUIT
DEBUG [FTPControlSocket] 9 Dec 2008 01:39:28.832 : 221-Goodbye. You uploaded 4468 and downloaded 0 kbytes.
DEBUG [FTPControlSocket] 9 Dec 2008 01:39:28.832 : 221 Logout.

FAILS
====

DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.546 : 227 Entering Passive Mode (117,58,251,10,137,225)
DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.562 : Server supplied address=117.58.251.10
DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.562 : Server supplied port=35297
DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.562 : NewPassiveDataSocket(117.58.251.10,35297)
DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.562 : ---> STOR /public_html/x.rar
DEBUG [FTPControlSocket] 9 Dec 2008 01:27:17.577 : 150 Accepted data connection
DEBUG [FTPClient] 9 Dec 2008 01:28:30.781 : Closing source stream
DEBUG [FTPClient] 9 Dec 2008 01:28:30.812 : Transferred 10447980 bytes to remote host
ERROR [FTPClient] 9 Dec 2008 01:30:31.344 : IOException in Put(string,string,bool) : System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
A first chance exception of type 'EnterpriseDT.Net.Ftp.FTPException' occurred in edtFTPnet.dll
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.StreamReader.ReadBuffer()
at System.IO.StreamReader.ReadLine()
at EnterpriseDT.Net.Ftp.FTPControlSocket.ReadReply()
at EnterpriseDT.Net.Ftp.FTPClient.ValidateTransfer()
at EnterpriseDT.Net.Ftp.FTPClient.Put(String localPath, String remoteFile, Boolean append)
CAUSED BY - System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.StreamReader.ReadBuffer()
at System.IO.StreamReader.ReadLine()
at EnterpriseDT.Net.Ftp.FTPControlSocket.ReadReply()
at EnterpriseDT.Net.Ftp.FTPClient.ValidateTransfer()
at EnterpriseDT.Net.Ftp.FTPClient.Put(String localPath, String remoteFile, Boolean append)
A first chance exception of type 'EnterpriseDT.Net.Ftp.FTPException' occurred in edtFTPnet.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll
The thread 0x1264 has exited with code 0 (0x0).
The thread 0x133c has exited with code 0 (0x0).
The program '[2104] Continuous.vshost.exe: Managed' has exited with code 0 (0x0).

Regards
Grant.

Answer 3

The server has timed out the connection. You need a higher server timeout.

Answer 4

Is this a client setting or do i need to contact my ISP?

Answer 5

Yes you need to ask your ISP to set the server timeout higher. It looks like it disconnects you after 1 minute.

Answer 6

Wouldnt the tranfser fail when using WSFTP though?

Answer 7

It depends how fast it is. If WSFTP is written in C (I think it is, it uses OpenSSL) it is probably quite a bit faster than a .NET application running in a virtual machine.

Take a look at the WSFTP log and see how long the transfer takes. If it is < 1 minute, try a bigger file that takes > 1 minute.

Answer 8

Hi, sorry its taken so long to get back to you but i have just tried uploading a 15MB file using WS. No problems there. Any ideas?
Oh and it took well over a minute as well.

Answer 9

Have you got a log file from WS? Or try Filezilla and see if anything is in the logfile. Sometimes clients can send NOOP messages during the transfer to keep the connection alive.

Answer 10

Hi again.. this is the log file from a 25MB file i just transferred..

STOR file.exe
150 Accepted data connection
226-File successfully transferred
226 175.365 seconds (measured here), 139.14 Kbytes per second
transferred 24986408 bytes in 175.359 seconds, 1113.179 Kbps ( 139.147 Kbps), transfer succeeded.
Transfer request completed with status: Finished
TYPE A
200 TYPE is now ASCII
PASV
227 Entering Passive Mode (117,58,251,10,230,220)
connecting data channel to 117.58.251.10:230,220(59100)
data channel connected to 117.58.251.10:230,220(59100)