Azure Logic Apps
An Azure service that automates the access and use of data across clouds without writing code.
3,542 questions
Logic App / SFTP-SSH Connector / No longer able to download file content
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bushman
46
Reputation points
Hello. There's this Azure logic app that retrieves a file from an sftp server and then creates a file from the content in the file in a Sharepoint Online site. Pretty simple. It uses the SFTP-SSH "When a file is added or modified" trigger to pick up a file when a new one is added on the sftp server. The files are relatively small usually under 1 meg in size. The logic app was put into operation July of 2024 and worked successfully until not long after March 10, 2025. What happens now is that the sftp-ssh connector detects when a file is added but it no longer downloads the file content. I tried switching the trigger to the sftp-ssh 'When files are added or modified (properties only)" and followed that with a "Get File Content" step and that doesnt retrieve the file content either. The 'When files are added or modified (properties only)" step shows the size of the file as being greater than zero but it never picks up the content. However, if I use Filezilla using the same creds, I am able to download the file.
The sftp server admin says that's nothing has changed on their end.
Does anyone have any ideas of what this problem might be and how to fix it?
Any feedback appreciated. Thanks.
Azure Logic Apps
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator2025-05-19T22:37:08.1433333+00:00 Hello bushman,
Are you encountering any errors? If so, please provide the error details.
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bushman 46 Reputation points
2025-05-20T11:22:19.3966667+00:00 In review of the logic app "Run History", for the "When a file is added or modified" SFTP-SSH connector step, you can see in the Raw Outputs that the step gets a 200 status code. In looking at the detail, it shows the name and path of the file that was added on the sftp server but the Content-Length shows "0" and as a result, there is no content downloaded. However, when I use Filezilla and download the file, it definitely has data in the file. This stopped working in mid-March. The logic app didn't change. The sftp server didnt change.
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator
2025-05-20T20:12:11.5333333+00:00 Hello bushman,
Could you please try creating a new connection in the SFTP - SSH connector by clicking on "Change Connection" and see if it fetches the content as well?
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator
2025-05-22T18:36:32.1+00:00 Hello bushman,
Following up to see if you have chance to check my previous response and please let us know with an update to assist you further on this.
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator
2025-05-23T19:56:15.7433333+00:00 Hello bushman,
We haven't heard back from you yet, and I wanted to ensure everything is on track and see if there's anything more, we can assist you with.
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bushman 46 Reputation points
2025-05-27T11:39:36.2133333+00:00 Hello. In the logic app, a new sftp-ssh connection was created as part of the "When a file is added or modified" SFTP trigger. Once that was set up, a number of new files showed up in the SFTP server folder and the trigger sensed that. When I looked at the results of the trigger action step in Run History, Raw Output, you can see that it was able to identify the new file name and file path, however, the Content-Length was equal to 0 and no file content was downloaded. You can pick up those files with Filezilla and they have data in the file.
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Sonny Gillissen 3,751 Reputation points Volunteer Moderator2025-06-01T18:17:33.0666667+00:00 Hi bushman
Thanks for reaching out on Microsoft Q&A!
I've checked the documentation and apparently there's a 'Get File Content (V2)' action available. It states to work exactly the same as the V1 for files smaller than 100MB, however it's worth the try to check if it solves your issue:
Please click ‘Accept answer’ if you think my answer is helpful. Feel free to drop additional queries in the comments below!
Kind regards,
Sonny
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bushman 46 Reputation points
2025-06-02T11:47:13.9+00:00 Hello. It looks like the Get file content (V2) is only available for a Standard Logic App with an app service plan. I'm using a Consumption logic app because of the very low number of workflow runs per month. The consumption logic app was working for 9 months and then it just stopped working. It was using the sftp-ssh 'When a file is added or modified' trigger'. It partially works where it senses that there's a new file on the sftp server but it's supposed to retrieve the file content of the less than 1 meg file but the content length is always zero (0) now. I tried the 'Get file content' action and it sees the file but is unable to retrieve the file content. When using Filezilla to download the file, it works. Just kinda baffled by this.
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator
2025-06-03T11:29:09.8066667+00:00 Hello bushman,Could you please try using get file content using path action and let us know with an update.
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bushman 46 Reputation points
2025-06-04T21:15:32.4766667+00:00 After working with the administrator of the remote sftp server, it shows that the remote sftp server is built on SSH-2.0-APACHE-SSHD-2.13.2. I had a small window of time to test out the logic app to see what shows up in the sftp server log when the logic app attempted to download file content. In the sftp server log, I took a quick screencap of the log that showed some of the activity when the logic app connected. The log records had a number of SSH_FXP_xxxx commands. One that I focused on was an SSH_FXP_OPEN command with the name of the file it was trying to download the content from. My understanding is the sftp connector was trying to open the file in READ mode so it could download the content in the file. When I looked closer at that SSH_FXP_OPEN command, it also had access=0x81, pflags=0x2. When i looked up what pflags=0x2 means, it shows that it was trying to open the file in WRITE mode. I'm not sure if this is the issue or not. I'm trying to get another session with the remote sftp server administrator to test out the logic app again and see if i can get some more information from the remote sftp server log.
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Praveen Kumar Gudipudi 1,875 Reputation points Microsoft External Staff Moderator
2025-06-05T00:37:48.02+00:00 Hello bushman,
Thanks for the information, check with write permission as well.
If you still face same issue, please feel free to reach out us.
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bushman 46 Reputation points
2025-06-05T14:41:51.69+00:00 Hello. Some additional logic app sftp-ssh "Get File Content" actions were traced on the remote sftp server. In the sftp server log, it shows a log record where it goes to open the remote file to read the content from. It's formatted like this:
SSH_FX_OPEN (path=/directory1/filename.txt, access=0x81, pflags=0x2, attrs={}) .
When you look up information on what the pflags=0x2 means, it says pflags is bitmask value that specifies how a file should be opened. 0x2 corresponds to SSH_FXF_WRITE -> Open the file for writing only. I read where an SFTP server should reject the operation. I didn't see the reject in the sftp server log but the logic app was unable to read the content in the file.
I know now that the remote sftp server was running SSH-2.0-APACHE-SSHD-2.9.2. It was upgraded in early April to SSH-2.0-APACHE-SSHD-2.13.2. After doing some research, I see that the last successful time that the sftp-ssh connector worked was on March 11, so i don't think that sftp server upgrade is the cause of the issue but I don't know if any other changes were made to the sftp server in preparation for the upgrade.
Clearly 0x2 is not the right pflags setting according to the SSH protocol.
Could this be the problem with the Azure logic apps SFTP-SSH connectors sending the wrong pflags value? Is there any way to change a pflags value when using the SFTP-SSH "Get File Content" action step?
Any feedback appreciated.
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Gaurav Kumar 780 Reputation points Microsoft External Staff Moderator2025-06-13T09:15:02.9566667+00:00 Hi bushman,Following up to check if the issue is resolved or if you need any further assistance. Let me know how it's going!
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bushman 46 Reputation points
2025-06-17T12:27:24.5433333+00:00 No solution for the original problem has been found for this. Not sure what happened. Workarounds are being investigated.
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Gaurav Kumar 780 Reputation points Microsoft External Staff Moderator
2025-06-25T09:37:45.5533333+00:00 Hi bushman,
Great! Thanks for the reply. Once you’ve had a chance to try the workarounds, please let us know how it’s going and whether it’s working or not.
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