From fjaeger at ur.rochester.edu  Sat Feb 10 21:11:14 2018
From: fjaeger at ur.rochester.edu (T. Florian Jaeger)
Date: Sat, 10 Feb 2018 15:11:14 -0500
Subject: [Rd] makeCluster hangs
Message-ID: <d5cb6887-2745-8e8a-a510-302ad736dbad@ur.rochester.edu>

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



[Rd] makeCluster hangs
T. Florian Jaeger