Shiny: Any way to not have the "ERROR: [on_request_read] connection reset by peer" appear when running apps in RStudio Viewer?

[daattali]

It seems to trip up beginners into thinking they've done something wrong.

[grayskripko]

hate this error.
I have another one case of it.
I use RSelenium+phantomjs to test a shiny app.
Built-in 'check' RStudio opportunity generates it too:

[loudermilk]

From RStudio I get this error (i.e. ERROR: [on_request_read] connection reset by peer) whenever I run my app in "_Viewer Pane_" or in "_External_", but I do not get the error when I run in "_Window_" mode.

[loudermilk]

New Shiny app, same error, but my "workaround" mentioned above doesn't work.
Shiny 1.0.3
shinyjs 0.9
R version 3.4.0 Patched (2017-05-25 r72742)

New perplexing behavior: (1) Launch RStudio, Run App, app works fine, close app; (2a) Run App (again), dies with ERROR: [on_request_read] connection reset by peer; (2b) Close RStudio, Launch RStudio, Run App, app works fine.

I've also tried removing all variable from global environment before re-running app, but that doesn't help.

Update: I isolated the problem, but I still don't know why its a problem. At the top of my app.R I make a series of library calls:

library(shiny)
library(shinydashboard)
library(ggplot2)
library(dplyr)
library(magrittr)
library(glue)
library(plotly)
library(shinyjs)

In my server block, I call observe() where I selectively show() and hide() various UI elements using shinyjs API.

...
    } else if (gt == "Redemptions") {
      hide(id = "dist_ctrls_panel")
      hide(id = "distPlot")
      hide(id = "scan_ctrls_panel")
      hide(id = "scanPlot")
      show(id = "redeem_ctrls_panel")
      show(id = "redeemPlot")
      }
...

Running elicited a strange warning:
Warning: Error in show: unused argument (id = "redeem_ctrls_panel") before the proverbial ERROR: [on_request_read] connection reset by peer.

I replaced my show() calls using the package::fun notation (e.g., shinyjs::show(id = "redeem_ctrls_panel")) and the app now works fine!

[jcheng5]

@loudermilk "connection reset by peer" is probably not the cause of the grey-out, but the result. Right before the call to show, try print(environment(show)), that should show you which package's implementation of show you're getting when you don't qualify it with the shinyjs:: prefix.

[jcheng5]

Moving this to httpuv

[daattali]

I'm going to make it more clear that showElement is the preferred alias to
show, it's one too many times that someone suffered from this!
On Jul 5, 2017 23:43, "Joe Cheng" [e-mail] wrote:

@loudermilk https://github.com/loudermilk "connection reset by peer" is
probably not the cause of the grey-out, but the result. Right before the
call to show, try print(environment(show)), that should show you which
package's implementation of show you're getting when you don't qualify it
with the shinyjs:: prefix.

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