search for: darwinssl

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2018 Oct 04
1
segfault issue with parallel::mclapply and download.file() on Mac OS X
...nately 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 using and specifically which TLS back-end curl has been configured with. When libcurl uses DarwinSSL, it may crash when opening HTTPS connections in a fork because CoreFoundation is not fork-safe. OTOH when using OpenSSL or LibreSSL for TLS, you usually get away with forking (though it's still bad practice). The standard version of libcurl that ships with MacOS was using CoreFoundation until...
2018 Sep 19
5
segfault issue with parallel::mclapply and download.file() on Mac OS X
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)) Instead of download a couple of files in parallel, I get a