Automatic resend of queued file when sending to mainframe
I'm having a problem sending some files to an IBM mainframe system. Sending small files causes no problems, only larger files. After initiating a transfer to the mainframe, the connection (over what I guess is port 21) is dropped after about 2 minutes, but the file transfer continues anyway. When the transfer is finished, the mainframe shows a successful end message on the log, but FileZilla then restarts the transfer and keeps resending the same file until manually terminated. This seems to be related to the dropped connection during the transfer as it doesn't happen for smaller files where the transfer finishes before the drop of connection. As mainframe file transfers often are difficult to test, I should be able to provide a test environment for you to help debugging this problem, should it be necessary.
The official FileZilla 3.3.3 is being used.
Please attach some logs.