Tracker Bug 157

Uploads of large files with FTP are restarting

Last modified: 2009-10-14 20:13:14

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: Uploads of large files with FTP are restarting Bug# 157
: WinSCP : Unspecified
: Core : unspecified
Status: RESOLVED : High
Resolution: FIXED   : Bug
Fixed in: 4.2.4
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Description
2008-02-15 09:36
 http://winscp.net/forum/viewtopic.php?t=5000
http://winscp.net/forum/viewtopic.php?t=5329
Comment #1
2008-02-16 20:29:26
 Mailed Albert at Sat, 16 Feb 2008 13:43:05 +0100
http://winscp.net/forum/viewtopic.php?p=18071#18071
Comment #2
2008-04-15 15:40:07
 Anyone else having the problem? Please post to the support forum.
Comment #3
2008-04-16 10:31:26
 http://winscp.net/forum/viewtopic.php?t=5531
Comment #4
2008-04-17 00:01:52
 Mailed RadPal at Thu, 17 Apr 2008 00:00:51 +0200
Comment #5
2008-05-21 17:39:38
 It has been observed with FileZilla Server that it does not acknowledge STOR command after otherwise successful upload of large file. Hence it makes WinSCP think that upload has failed and restarts.

FileZilla client seems to succeed to work. But this is probably only because it seems to simply log "Timeout detected" log entry, without any retry attempt (which it does not support).

References:
Paul DePesa
Also email to Paul DePesa on Sat, 26 Apr 2008 22:03:07 +0200
Comment #6
2008-10-09 12:48:44
 http://winscp.net/forum/viewtopic.php?t=6211
Comment #7
2008-12-02 09:02:53
 The same issue with Pure-FTPd.
http://winscp.net/forum/viewtopic.php?t=6361
Not checked if it the same server-side issue, but looks similar.
Comment #8
2009-01-25 14:16:18
 Possibly related to Bug 363.
Comment #9
2009-06-22 09:06:52
 Possibly related report stating that the problem disappears when Windows firewall is deactivated
http://winscp.net/forum/viewtopic.php?t=7016
Comment #10
2009-06-22 09:14:39
 Though the above report is for downloads, not uploads.
Comment #11
2009-07-29 10:23:42
 http://winscp.net/forum/viewtopic.php?t=7151
Comment #12
2009-08-12 20:53:06
 I'm still looking for someone patient enough to help me trace this problem!
Comment #13
2009-10-14 20:13:14
 Quick and dirty solution: When connection breaks during transfer and after reconnect the target file has the same size as source file, do not restart transfer. Consider transfer successful instead.

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WinSCP is an open source SFTP client and FTP client for Windows. Its main function is the secure file transfer between a local and a remote computer. Beyond this, WinSCP offers basic file manager functionality. It uses Secure Shell (SSH) and supports, in addition to Secure FTP, also legacy SCP protocol. [More]

WinSCP is also available as a plugin to two file managers, FAR and Altap Salamander.

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WinSCP is free, open-source software, and is distributed under the GNU General Public License (GPL). [More]

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