Disconnected from Server whenever two people use the app?

[vonplato]

Hello,

I have a small app here:

https://michaelvonplato.shinyapps.io/covidDeaths

I am wondering why is that whenever multiple people try to access at the same time it starts disconnecting people from the server? What settings do I have to change to make this work a little better for multiple users?

I don't need TONS of users, but I have tested this out with a friend and it does it with as few as TWO users. It seems like I am not going to be able to continue paying for this service if I can't even let two people see the app at the same time. I am hoping there is just some settings I have overlooked?

Thank you

[andresrcs]

That is not normal behavior, as far as I know, each worker allows for 50 concurrent connections by defaul so maybe the problem has to do with your specific code rather than the hosting service. Could you check what your app's logs say?

[technocrat]

Pointer to configuration

[vonplato]

Just looks like some basic warnings that are typically not even displayed in my console:

2020-09-07T23:50:06.426659+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.409524+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.426658+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.426659+00:00 shinyapps[2024413]: Attaching package: ‘rsconnect’
2020-09-07T23:50:06.426933+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.409769+00:00 shinyapps[2024413]:     layout
2020-09-07T23:50:06.409769+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.408973+00:00 shinyapps[2024413]: Attaching package: ‘plotly’
2020-09-07T23:50:06.409768+00:00 shinyapps[2024413]: The following object is masked from ‘package:graphics’:
2020-09-07T23:50:06.426934+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.426933+00:00 shinyapps[2024413]:     serverInfo
2020-09-07T23:50:06.426932+00:00 shinyapps[2024413]: The following object is masked from ‘package:shiny’:
2020-09-07T23:50:06.486242+00:00 shinyapps[2024413]: 
2020-09-07T23:50:06.486243+00:00 shinyapps[2024413]: Listening on http://127.0.0.1:46449
2020-09-07T23:50:11.201257+00:00 shinyapps[2024413]: Warning: `arrange_()` is deprecated as of dplyr 0.7.0.
2020-09-07T23:50:11.201258+00:00 shinyapps[2024413]: Please use `arrange()` instead.
2020-09-07T23:50:11.201260+00:00 shinyapps[2024413]: See vignette('programming') for more help
2020-09-07T23:50:11.201261+00:00 shinyapps[2024413]: Call `lifecycle::last_warnings()` to see where this warning was generated.
2020-09-07T23:50:11.201260+00:00 shinyapps[2024413]: This warning is displayed once every 8 hours.
2020-09-07T23:50:12.075802+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:12.075804+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:12.075805+00:00 shinyapps[2024413]: 
2020-09-07T23:50:12.171257+00:00 shinyapps[2024413]: A marker object has been specified, but markers is not in the mode
2020-09-07T23:50:12.079053+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:12.079054+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:12.171259+00:00 shinyapps[2024413]: Adding markers to the mode...
2020-09-07T23:50:12.079055+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.571051+00:00 shinyapps[2024413]: A marker object has been specified, but markers is not in the mode
2020-09-07T23:50:15.571052+00:00 shinyapps[2024413]: Adding markers to the mode...
2020-09-07T23:50:15.474275+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:15.474283+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.474283+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:15.477865+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:15.477866+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:15.477867+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.572071+00:00 shinyapps[2024413]: Valid attributes include:
2020-09-07T23:50:15.572070+00:00 shinyapps[2024413]: Warning: 'scatter' objects don't have these attributes: 'dash'
2020-09-07T23:50:15.572073+00:00 shinyapps[2024413]: 'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'meta', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'uirevision', 'x', 'x0', 'dx', 'y', 'y0', 'dy', 'stackgroup', 'orientation', 'groupnorm', 'stackgaps', 'text', 'texttemplate', 'hovertext', 'mode', 'hoveron', 'hovertemplate', 'line', 'connectgaps', 'cliponaxis', 'fill', 'fillcolor', 'marker', 'selected', 'unselected', 'textposition', 'textfont', 'r', 't', 'error_x', 'error_y', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'metasrc', 'hoverinfosrc', 'xsrc', 'ysrc', 'textsrc', 'texttemplatesrc', 'hovertextsrc', 'hovertemplatesrc', 'textpositionsrc', 'rsrc', 'tsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
2020-09-07T23:50:15.572073+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.588603+00:00 shinyapps[2024413]: Warning: 'scatter' objects don't have these attributes: 'dash'
2020-09-07T23:50:15.588604+00:00 shinyapps[2024413]: Valid attributes include:
2020-09-07T23:50:15.588607+00:00 shinyapps[2024413]: 'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'meta', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'uirevision', 'x', 'x0', 'dx', 'y', 'y0', 'dy', 'stackgroup', 'orientation', 'groupnorm', 'stackgaps', 'text', 'texttemplate', 'hovertext', 'mode', 'hoveron', 'hovertemplate', 'line', 'connectgaps', 'cliponaxis', 'fill', 'fillcolor', 'marker', 'selected', 'unselected', 'textposition', 'textfont', 'r', 't', 'error_x', 'error_y', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'metasrc', 'hoverinfosrc', 'xsrc', 'ysrc', 'textsrc', 'texttemplatesrc', 'hovertextsrc', 'hovertemplatesrc', 'textpositionsrc', 'rsrc', 'tsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
2020-09-07T23:50:15.588608+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.878525+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:15.878527+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:15.970251+00:00 shinyapps[2024413]: Warning in RColorBrewer::brewer.pal(N, "Set2") :
2020-09-07T23:50:15.878527+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.975423+00:00 shinyapps[2024413]: A marker object has been specified, but markers is not in the mode
2020-09-07T23:50:15.970252+00:00 shinyapps[2024413]:   minimal value for n is 3, returning requested palette with 3 different levels
2020-09-07T23:50:15.970253+00:00 shinyapps[2024413]: 
2020-09-07T23:50:15.975424+00:00 shinyapps[2024413]: Adding markers to the mode..

[andresrcs]

Nothing evident there, Could you provide a reproducible example (reprex) illustrating your issue? Please have a look at this resources, to see how to create one for a shiny app

Chapter 5 Workflow | Mastering Shiny

Shiny debugging and reprex guide

Shiny issues can be challenging to resolve relative to other problems with your code or statistical methods. Shiny apps are often large, complex projects with interacting files. When seeking help from others it is considered polite to: First, do your best to work through RStudio's debugging tools to diagnose your issue on your own. Often those shiny logs and tracebacks are useful to others trying to help out. Second, strive to minimize the effort required to replicate your issue. You can do this with a reproducible example ("reprex"). Shiny Debugging Errors in Shiny code can be difficult to track down. If you don't know where your problem is coming from, you can track it down with some o…