Plots/GR + png() results in "Too many open files"

General Usage
11

In the meantime I could reproduce the problem on Ubuntu 20.04. The point is, that due to the plugin setting (QT_QPA_PLATFORM) the GKS QtTerm socket is never closed.

If you want to produce the PNGs only, then it’s much easier to use the following script:

using Plots
using Printf

ENV["GKSwstype"] = "100"

gr()

for i = 1:2000
    scatter(rand(5), rand(5))
    fn = @sprintf("hepp-%4.4i.png", i)
    println(i)
    png(fn)
end
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