PutFiles / Check ends up uploading files multiple times :: Support Forum

mariant Guest

PutFiles / Check ends up uploading files multiple times

2019-03-21 18:07

Hi there,

This might be a server-side-caused-problem, but ...

I have a process where I upload files on SFTP protocol and then check for errors.
The files are in a Outbox folder when picked up by PutFiles.... then I call the Check().
From the transferResult.Transfers collection I take file by file and create my log and move the files to an Archive folder.
Everything works fine on my side, but on the server side, a file looks like it is uploaded multiple times ("they" have a log showing multiple uploads), and that might be because the destination file gets picked up "too quick" before my process ends.

Can someone explain why/how PutFiles works and why is re-uploading files?
As a note, the ResumeSupport is set to off.

Thanks

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 38,695
Location:: Prague, Czechia

Re: PutFiles / Check ends up uploading files multiple times

2019-03-22

Please attach a full session log file showing the problem (using the latest version of WinSCP).

To generate the session log file, set Session.SessionLogPath. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

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mariant Guest

Re: PutFiles / Check ends up uploading files multiple times

2019-03-29 00:07

Hi,

I am attaching here the session log.
It is the entire log generated while I was trying to upload a 74 KB file.
There seems to be a "Network error: Software caused connection abort".

The log I generate inside my code does not capture an error.

These are some lines from the log I generate:

2019-03-28 12:20:12.668 | Connect to WinSCP.
2019-03-28 12:20:16.944 | Try upload all files in Outbox folder...
2019-03-28 12:20:37.732 | ...Done
2019-03-28 12:20:37.741 | Uploaded Files: 1, Files Failed: 0

And this is the relevant code that produces the above 4 lines of log.

// Connect
Add2Log("Connect to WinSCP.");
session.Open(sessionOptions);
 
// Upload files
TransferOptions transferOptions = new TransferOptions();
transferOptions.TransferMode = TransferMode.Automatic;
transferOptions.PreserveTimestamp = false;
transferOptions.ResumeSupport.State = TransferResumeSupportState.Off;
 
TransferOperationResult transferResult;
 
Add2Log("Try upload all files in Outbox folder...");
transferResult = session.PutFiles(
      outboxFolder + "*"
    , remoteFolder
    , false
    , transferOptions
  );
// Throw on any error
transferResult.Check();
Add2Log("...Done");
Add2Log(string.Format(
     "Uploaded Files: {0}, Files Failed: {1}"
    , transferResult.Transfers.Count
    , transferResult.Failures.Count
  ));

Thanks

Session_log_20190328_122012.log (13.58 KB)

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 38,695
Location:: Prague, Czechia

Re: PutFiles / Check ends up uploading files multiple times

2019-03-29

The connection was indeed lost during the first upload attempt.
Can you have them check theirs logs to see if the server had any reason to terminate the connection?

See also Network error: Software caused connection abort

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PutFiles / Check ends up uploading files multiple times