sshnet / sshnet/SSH.NET

Sftpclient uploadfile concurrency issues

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#640 10 comments 3 reactions 0 assignees View on GitHub

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Dominant language
C#
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Description

I have a singleton sftpclient. Multiple threads use this instance and call upload file method asynchronously(using begin upload file). I’m getting the following errors
“Message type 52 is not valid in the current context”
“The requested operation cannot be performed because there is a file transfer in progress”

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the report with one SftpClient instance, multiple threads, and concurrent BeginUploadFile calls. Read the SftpClient upload API and its concurrency guidance, then identify whether the reported protocol-context and file-transfer-in-progress errors can be reproduced reliably. Done means concurrent uploads behave consistently without either error, with regression coverage for the demonstrated usage.

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

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