I tracked it down under ubuntu with the following commands
pdiof julia
lsof -p #fromprevoiucommand
which lists not only the number of files open, but also the path to the
files. Very useful.
I tracked this down and was a bit surprised. My code was essentially doing
the following
julia> f() = collect(eachline(open("testfile","r")))
f (generic function with 1 method)
julia> for j=1:typemax(Int)
println(j)
f()
end
...
1011
ERROR: opening file testfile: Too many open files
in open at ./iostream.jl:117
in open at ./iostream.jl:125
in anonymous at no file:3
which doesn't explicitly close the file I open. I guess I had assumed
eachline would close the file after iteration was finished, though the
documentation does not say that it will. I had further thought that the
garbage collector would close the file once the function was done
executing, which apparently also doesn't happen. I must have gotten the
impression from python that the file would be automatically closed
(sometime) after the function was done, since roughly equivalent code in
python does not crash. Is the garbage collector supposed to close the file
in this case?
