Application failed to start on shiny web server after a few days

I have a running shiny app on a web server that worked fine until I would say last week. Now, on occasion (I guess every two days) the app stops working with the "Application failed to start" message. When I restart the shiny server, as I did just now, everything runs fine again.

https://butterlab.imb-mainz.de/flydev/

The funny thing is, I have other apps on this server as well, and they are not affected and run fine in parallel, even if this app failed.

I can not find any error message in the log files. And I am wondering: how I could debug this, since the app is now running fine?

Looking forward to any advice.

EDIT:
I checked the shiny-server.log file after the error occurred and I found the following message:

[2018-06-14 14:29:20.080] [WARN] shiny-server - RobustSockJS collision: MqU4rgur76RPgjJIPr [2018-06-15 01:28:18.398] [WARN] shiny-server - Error handling message: Error: Discard position id too big [2018-06-15 02:00:10.358] [INFO] shiny-server - Error getting worker: Error: The application took too long to respond. [2018-06-15 02:00:10.364] [INFO] shiny-server - Error getting worker: Error: The application took too long to respond. 

The last message gets repeated whenever someone accesses the server.

0 Answers

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