SftpPermissionDeniedException on Download when File Transfer in Progress
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- Dominant language
- C#
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Description
When attempting to download a file that is being written to on the source SFTP file server, I'm getting a SftpPermissionDeniedException. We trap for the error and retry the download after a 15 s pause. However, even after the file has been closed on the SFTP server the same exception occurs in code when downloading the file. It seems like the status of the file isn't updated or an exception isn't getting cleared in the SSH.NET code on subsequent download attempts.
SftpClient.DownloadFile(path, stream, callback)
The only way I've gotten this to work is to call Disconnect on the SftpClient and then Connect before attempting the download again.
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Research direction
Start at the reported SftpClient.DownloadFile(path, stream, callback) entry point and reproduce a download while the remote file is being written, then retry after it closes. Trace how SftpPermissionDeniedException is handled across the retry and compare behavior with reconnecting the SftpClient. Done means a subsequent download succeeds without disconnecting and reconnecting.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100