Dear Henrik, thank you, for the quick reply. Bizarrely enough, the problem vanished when I woke the computer from sleep (I had previously replicated the problem after several restarts of both R and the MacOS).
I will follow-up if I can again replicate the problem. Florian On 2/10/18 4:39 PM, Henrik Bengtsson wrote: > A few quick comments: > > * You mention R --vanilla, but make sure to try with > parallel::makeCluster(), so that you don't happen to pick up > snow::makeCluster() if 'snow' is attached and ahead of parallel on the > search() path. > > * Try creating a single background worker, i.e. parallel::makeCluster(1L). > > * Try with cl <- future::makeClusterPSOCK(1L, verbose = TRUE), which > gives the same thing, but it also show you some details on what it > does internally; that may give some clues where it stalls. > > /Henrik > > On Sat, Feb 10, 2018 at 12:11 PM, T. Florian Jaeger > <fjae...@ur.rochester.edu> wrote: >> Hi all, >> >> I can't get the functionality of the package parallel to work. Specifically, >> makeCluster() hangs when I run it. I first noticed the problem when trying >> to run Rstan with multiple cores and the traced it back to the core package >> parallel. The following results in R hanging after the call to makeCluster. >> >> library(parallel) >> >> # Calculate the number of cores >> no_cores <- detectCores() - 1 >> >> # Initiate cluster >> cl <- makeCluster(no_cores) >> >> I'm running MacOS High Sierra 10.13.3 (17D47) on a MacbookPro 2017 laptop >> with 4 cores. >> >> platform x86_64-apple-darwin15.6.0 >> arch x86_64 >> os darwin15.6.0 >> system x86_64, darwin15.6.0 >> status >> major 3 >> minor 4.3 >> year 2017 >> month 11 >> day 30 >> svn rev 73796 >> language R >> version.string R version 3.4.3 (2017-11-30) >> nickname Kite-Eating Tree >> >> The problem replicates in R --vanilla >> >> >> I've spent hours googling for solutions but can't find any reports of this >> problem. Any help would be appreciated. >> >> >> Florian >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Ddevel&d=DwIBaQ&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=O6dqVFPEDpdoXY3wkv8u6o0LHKx4WbQ_itn0O87jj5s&m=R7DIWWqYTP2xarhrvKcymtN3XlAQ9vHLFDhPL6FxQ60&s=7F8Lez-XE8iC2JBU4JYsEtF3U0HObhMnCASud5xTgNM&e= > . > -- T. Florian Jaeger Professor of the Brain and Cognitive Sciences, Computer Science Alfred P. Sloan Research Fellow University of Rochester, Meliora Hall, Box 270268, Rochester, NY 14627-0268 USA P: +1 (585) 276 3611 F: +1 (585) 442 9216 E: fjae...@ur.rochester.edu B: http://www.hlplab.wordpress.com/ T: https://twitter.com/_hlplab_ To schedule an appointment, please visit http://www.bcs.rochester.edu/people/fjaeger/appointments.html [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel