How to enable debug logs in shiny server.

[kapoorakansha]

We have a web-based Shiny server application that is used to copy files in a virtual machine from Azure.

As a user, after visiting the application, I encounter an error in the UI showing Disconnected from Server with a reload option. How to enable debug logs in shiny server.

Upon further inspection in the developer tools (Chrome) in console, I can see the message:
“The application unexpectedly exited. Diagnostic information is private. Please ask your system admin for permission if you need to check the R logs.”

I would appreciate if someone could let us know how to enable the debug logs in shiny server suggestions and how we should monitor R logs to diagnose this issue. If anyone has faced a similar issue with their Shiny app, your help would be greatly appreciated.

[jcheng5]

The full documentation for the logging features of Shiny Server are here: https://docs.posit.co/shiny-server/#logging-and-analytics

but the TL;DR is that the application logs are in /var/logs/shiny-server/*.log.

[kapoorakansha]

@jcheng5 Thank you for the suggestion provided. However, after adding the line "env SHINY_LOG_LEVEL=DEBUG" in etc/shiny-server.conf and post stopping and starting the shiny-server service we are getting error while starting the service.

Also, the conf file in our case is not present in the location /etc/init instead it is directly present under /etc/shiny-server folder.

Please suggest on the next steps to be followed in order to view the logs.