Problem with disconnecting UFTPDs
Encrypted UDP based FTP with multicast
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Hi, I am sending some files from UFTP server to few UFTPD in my LAN. I am running UFTP in multiple sessions. But sometimes when one file is sent to more than one localization happens something like in the attached log. Do you have any idea why it might keep disconnecting?
I've changed names of directories and files.
Thanks in advance for your help
Last edit: Kacper Marczyk 2020-06-19
This server log indicates that the client is not responding to a FILEINFO. What is in the client log in this case?
Actually logs on clients are clear - no mentions about these files. On server it still saying "Resource temporarily unavailable\nFailed to read directory". We are sending files from CIFS share in multiple sessions of UFTP server to multiple UFTPDs at the same moment. Do you think that might be the problem?
Last edit: Kacper Marczyk 2020-06-22
The "Resource temporarily unavailable" is some sort of local issue reading files. That shouldn't affect the session dropping out, however. The server is sending a FILEINFO and not getting a FILEINFO_ACK back from the client. Seeing both the server log and the associated client log when this happens will help figure out what is happening.
Hi, In attachment you can find logs from server and from one of the clients. As you can see there is nothing about files from server in the client (take a look on the time of sending from server and receiving time on client).
The server log is incomplete, so it's hard to see what might have happened. Also, based on the timestamps it doesn't look like the server log and client log correspond with each other.
I'll need to see a complete client log and server log from the same session (i.e. the same group ID appears in both logs) to have any idea what might be happening.
Hi again Dennis, when we are sending only one session problem occurs less times then before. But sometimes we still gets such error: Transfer aborted by 0xF58BD285: Transfer timed out
Connection works fine on both of devices.
Do you have any information what this error stands for?
This indicates that a client aborted the session because no messages had been received from the server after some time. Exactly how long depends on the current GRTT (group round trip time) and which phase of the session the client is in.
Try running a Wireshark trace on the client to see exactly what is coming in and when.