[Rd] makeCluster hangs
T. Florian Jaeger
fjaeger at ur.rochester.edu
Sun Feb 11 21:51:57 CET 2018
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.
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.
> On Sat, Feb 10, 2018 at 12:11 PM, T. Florian Jaeger
> <fjaeger at 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.
>> # 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
>> 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.
>> R-devel at r-project.org mailing list
T. Florian Jaeger
Professor of the Brain and Cognitive Sciences,
Alfred P. Sloan Research Fellow
University of Rochester,
Meliora Hall, Box 270268,
Rochester, NY 14627-0268
P: +1 (585) 276 3611
F: +1 (585) 442 9216
E: fjaeger at ur.rochester.edu
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