Jeroen/Tomas,
Thanks for the additional follow-ups. As shown in my original post, I am on
macOS 10.12.6. I was using the command line version of R to get the error
message I sent; I also get similar problems when running via GUI tools such
as RStudio. I have co-workers who are only using macOS and
On Thu, Oct 4, 2018 at 6:12 PM Tomas Kalibera wrote:
>
>
> Thanks for the report, but unfortunately I cannot reproduce on my system
> (either macOS nor Linux, from the command line) to debug. Did you run
> this in the command line version of R?
It depends on which version of MacOS that you are us
Thanks for the report, but unfortunately I cannot reproduce on my system
(either macOS nor Linux, from the command line) to debug. Did you run
this in the command line version of R?
I would not be surprised to see such a crash if executed from a
multi-threaded application, say from some GUI
Thanks for the warning about fork without exec(). A co-worker of mine, also
on Mac, ran the sample code and got an error about that exact problem.
Thanks also for the pointer to try curl::multi_add() or download.file()
with a vector of files.
My actual use case includes downloading the files and
This code actually happens to work for me on macOS, but I think in
general you cannot rely on performing HTTP requests in fork clusters,
i.e. with mclapply().
Fork clusters create worker processes by forking the R process and
then _not_ executing another R binary. (Which is often convenient,
becau
> Seth Russell
> on Wed, 19 Sep 2018 15:19:48 -0600 writes:
> I have an lapply function call that I want to parallelize. Below is a very
> simplified version of the code:
> url_base <- "https://cloud.r-project.org/src/contrib/";
> files <- c("A3_1.0.0.tar.gz", "ABC.RA
I have an lapply function call that I want to parallelize. Below is a very
simplified version of the code:
url_base <- "https://cloud.r-project.org/src/contrib/";
files <- c("A3_1.0.0.tar.gz", "ABC.RAP_0.9.0.tar.gz")
res <- parallel::mclapply(files, function(s) download.file(paste0(url_base,
s), s
