Do shiny apps on shiny-server only log errors when R errors?

[Mitchell Gritts]

My app is on an AWS EC2 instance, the sample apps when installed create logs when errors occur. For instance, before I installed rmarkdown the rmarkdown document created a log in /var/log/shiny-server/, however the app I have included in /srv/shiny-server/sample-apps isn't creating logs.

Are logs only created when R code throws errors? My current error disconnects from server, put no log is created and I can't find errors messages except for in the javascript console.

[Joe Cheng]

App log files are written but automatically deleted unless the R process exits abnormally (crashes, basically). Section 3.5.1 of the Shiny Server docs describes the preserve_logs directive, which prevents the automatic deletion.

What's the JS console say?

On Mon, Jul 11, 2016 at 1:10 PM Mitchell Gritts <mitchel...@gmail.com> wrote:

My app is on an AWS EC2 instance, the sample apps when installed create logs when errors occur. For instance, before I installed rmarkdown the rmarkdown document created a log in /var/log/shiny-server/, however the app I have included in /srv/shiny-server/sample-apps isn't creating logs.

Are logs only created when R code throws errors? My current error disconnects from server, put no log is created and I can't find errors messages except for in the javascript console.

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[Mitchell Gritts]

I fixed it following instructions for running behind a proxy. The error was similar to this GitHub issue. 

However, a websocket error persists over ethernet at work. I figure the error may be related to a firewall of some kind? 

sockjs-0.3.4.min.js:27 WebSocket connection to 'ws://52.42.52.251/sample-apps/telemetR/__sockjs__/n=0bC168YIu4I2h8Kddg/252/yanxpdex/websocket' failed: 
Error during WebSocket handshake: Unexpected response code: 400




Thanks