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Sysax Product Forums / Sysax Multi Server / Bugs and Feature Requests / SFTP file transfer aborts at key re-exchange
Posted:  05 Dec 2011 19:17
Hi,
I'm seeing a situation where a large upload (SFTP) to the Sysax server dies at about the same time each time it is attempted. Can anyone suggest a reason for this? Server version is 5.14 running on Windows Server 2008.

Here are logs of the repeated attempts to transfer (out of FileZilla).  It appears that the issue might be due to a failure during "key re-exchange: see final log lines below.

-------------------------------
Status:    Connecting to msftp01...
Response:    fzSftp started
Command:    open "target@msftp01" 22
Command:    Pass: *******
Status:    Connected to msftp01.infoplanning.local
Status:    Starting upload of d:\temp\bigfile.txt
Command:    cd "/Test"
Response:    New directory is: "/Test"
Command:    put "d:\temp\bigfile.txt" "bigfile.txt"
Status:    local:d:\temp\bigfile.txt => remote:/Test/bigfile.txt
Error:    Connection timed out
Error:    File transfer failed after transferring 992,948,224 bytes in 127 seconds

Status:    Starting upload of d:\temp\bigfile.txt
Command:    put "d:\temp\bigfile.txt" "bigfile.txt"
Status:    local:d:\temp\bigfile.txt => remote:/Test/bigfile.txt
Error:    Connection timed out
Error:    File transfer failed after transferring 992,317,440 bytes in 126 seconds

Command:    put "d:\temp\bigfile.txt" "bigfile.txt"
Status:    local:d:\temp\bigfile.txt => remote:/Test/bigfile.txt
Error:    Connection timed out
Error:    File transfer failed after transferring 992,382,976 bytes in 127 seconds

Command:    put "d:\temp\bigfile.txt" "bigfile.txt"
Status:    local:d:\temp\bigfile.txt => remote:/Test/bigfile.txt
Error:    Connection timed out
Error:    File transfer failed after transferring 992,419,840 bytes in 127 seconds
------------------------

Logging with 'Verbose' mode activated:
12:07:01    Command:    put "d:\temp\bigfile.txt" "bigfile.txt"
12:07:01    Status:    local:d:\temp\bigfile.txt => remote:/Test/bigfile.txt
12:08:48    Trace:    Initiating key re-exchange (too much data sent)
12:08:53    Trace:    Server unexpectedly closed network connection
12:08:53    Error:    Server unexpectedly closed network connection
12:08:53    Trace:    CSftpControlSocket::ResetOperation(66)
12:08:53    Trace:    CControlSocket::ResetOperation(66)
12:10:48    Trace:    Server unexpectedly closed network connection
12:10:48    Error:    Server unexpectedly closed network connection
12:10:48    Trace:    CSftpControlSocket::ResetOperation(66)
12:10:48    Trace:    CControlSocket::ResetOperation(66)
12:10:48    Error:    File transfer failed after transferring 992,317,440 bytes in 227 seconds
Posted:  07 Dec 2011 08:28
This thread has been moved to the Sysax Multi Server bugs section.
Are you able to reproduce the same issue with the latest product release (version 5.5)?


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