Hi all, The function makeCluster() of parallel does not work on my laptop. It hangs infinitely.
*1. Problem Summary:* > # Loading parallel packages > library(parallel) > cl <- makeCluster(2) # It hangs at this line of code. It hangs at the second line of the code. *2. Potential Reason* I also tried to see the details of what it does internally by using the following code. > library(future) > cl <- future::makeClusterPSOCK(1L, verbose = TRUE) # It hangs at this line of code. And it returns the following descriptions and hangs. *Workers: [n = 1] ‘localhost’* *Base port: 11214* *Creating node 1 of 1 ...* *- setting up node* *Starting worker #1 on ‘localhost’: '/Library/Frameworks/R.framework/Resources/bin/Rscript' --default-packages=datasets,utils,grDevices,graphics,stats,methods -e 'parallel:::.slaveRSOCK()' MASTER=localhost PORT=11214 OUT=/dev/null TIMEOUT=2592000 XDR=TRUE* *Waiting for worker #1 on ‘localhost’ to connect back* So the problem is that the "worker #1 on 'local host'" never connects back, and that's why it hangs forever. I have no idea what causes this. *3. my sessionInfo():* R version 3.5.1 (2018-07-02) Platform: x86_64-apple-darwin15.6.0 (64-bit) Running under: macOS High Sierra 10.13.6 Matrix products: default BLAS: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRblas.0.dylib LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] compiler_3.5.1 I spent hours searching for the solutions but failed. It looks like some other people met similar problem here <http://r.789695.n4.nabble.com/makeCluster-hangs-td4748238.html>. Also, I posted this question online here <https://stackoverflow.com/questions/52264460/r-parallel-makecluster-hangs-infinitely-on-mac/52284709#52284709> a week ago. Any suggestion would be appreciated. Thanks a lot! Thanks, Zhihao -- Zhihao (Daniel) Huang Graduate Student Department of Statistics, University of Michigan, Ann Arbor Email: zhhhw...@umich.edu -- 黄 之昊 Zhihao Huang Graduate Student Department of Statistics, University of Michigan, Ann Arbor Email: zhhhw...@umich.edu [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
