Dear community I am seeking help about python and Fortran languages servers in VS Code (no syntax highlighting after using persistent sessions two weeks ago). I already posted two issues on pylance and remote-ssh github pages. After discussion with a pylance developer, we think the problem may be w…

Hi @qinggangg , Thanks for reaching out to ACCESS-NRI. Your specific question is outside the topics that ACCESS-NRI officially supports. However, there may be a community member who can help you with your question.

Hi @harshula Thank you, I fully understand. It would be greatly appreciated if anyone could provide some information about the use of localhost/X11 forwarding by persistent-session/rose/cylc.

Could you clarify why you think the persistent session is involved? Are you trying to run vscode on the persistent session? As I understand it there’s a special compute node on Gadi that runs everyone’s persistent session, with some DNS magic to set up the ssh.

Hi Scott. Thank you for having a look. I am not running VS Code on persistent session. I only run ACCESS-rAM3 on persistent session before, and now I killed all persistent-session and deleted the folder ~/persistent-session. However, the problem with language servers in VS code persists. I thought …

No that is unrelated. ‘localhost’ is an alias that refers to the node that a process is running on. For vscode running on a login node, localhost will be that login node. For cylc running on the persistent session, localhost will be the persistent session node.

I got the following email from the NCI Helpdesk. In short, Gadi kill pylance processes on VSCode without any warning. Would you have any suggestions for a workaround? I do like connecting to Gadi using VS Code and coding in Python on that for data analysis. Could I log into a computing node directl…

Hi @qinggangg , You can connect to a compute node using VSCode. I think the easiest way is to add a Match section in your ssh config file to check for a specified Host with the pattern gadi-cpu- (as all the Gadi compute nodes start with this pattern): Match exec "echo %n | grep -q '^gadi-cpu-'" …

Hi Davide Thank you. That is super helpful. I followed your instruction in another thread , and the python and fortran language servers finally get to work now:) Have you used Modern Fortran in VS Code for fortran code syntax highlighting/hover? While the fortran language server is working with for…

Hi @qinggangg , Happy to know you managed to get the Python and Fortran language servers to work. I don’t have much experience with Fortran in general, and I have never used Modern Fortran, so I cannot be of help there sorry. Davide

Python and Fortran languages servers in VS Code not working after using cylc/rose/persistent-sessions

Technical

qinggangg (Qinggang Gao) 1 July 2025 23:42 7

Thank you. That is good for me to know.

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Python and Fortran languages servers in VS Code not working after using cylc/rose/persistent-sessions

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