multicore mclapply hangs when 'debug' loaded

Dirk Eddelbuettel skrev:
On 10 August 2009 at 13:55, Rune Schjellerup Philosof wrote:
| When I execute mclapply it creates the needed processes, but these
| processes never begin computing anything, they just wait indefinitely.

I discovered that it occurs when I have loaded the 'debug' package at
the same time as the 'multicore' package.
However, I use a version of the 'debug' package that hasn't been
released yet.
Still though, it also some times happen when I don't have 'debug' loaded
(I just realized because of the sessionInfo included below).
But at the moment I have to load the 'debug' package to make the bug
appear (just loading mvbutils does not cause the effect).
Would you have a reproducible example?  

Start R --vanilla:
library(debug)
library(multicore)
example(mclapply)
| I recently upgraded to version 2.9.1, which might have caused the problem.

That would surprise me but one never knows.

I mention it because the debug package stopped working because of
non-backwards-compatible changes.
| I use Ubuntu 8.10.
| 
| > sessionInfo()
| R version 2.9.1 (2009-06-26)
| x86_64-pc-linux-gnu
| 
| locale:
| LC_CTYPE=da_DK.UTF-8;LC_NUMERIC=C;LC_TIME=da_DK.UTF-8;LC_COLLATE=da_DK.UTF-8;LC_MONETARY=C;LC_MESSAGES=da_DK.UTF-8;LC_PAPER=da_DK.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=da_DK.UTF-8;LC_IDENTIFICATION=C
| 
| attached base packages:
| [1] stats     graphics  grDevices utils     datasets  methods   base
| 
| other attached packages:
| [1] multicore_0.1-3
| 
| loaded via a namespace (and not attached):
| [1] tcltk_2.9.1 tools_2.9.1
| 
| 
| 
| 
| -- 
| Med venlig hilsen
| Rune Schjellerup Philosof
| Ph.d.-studerende, Statistik, IST, SDU
| 
| Telefon:  6550 3607
| E-mail:   rphilosof at health.sdu.dk
| Adresse:  J.B. Winsl?wsvej 9, 5000 Odense C
| 
| _______________________________________________
| R-sig-hpc mailing list
| R-sig-hpc at r-project.org
| https://stat.ethz.ch/mailman/listinfo/r-sig-hpc

Med venlig hilsen
Rune Schjellerup Philosof
Ph.d.-studerende, Statistik, IST, SDU

Telefon:  6550 3607
E-mail:   rphilosof at health.sdu.dk
Adresse:  J.B. Winsl?wsvej 9, 5000 Odense C

multicore mclapply hangs when 'debug' loaded

Thread (6 messages)