[R-sig-Geo] Problem with using multicore resample in Raster package

[Michael Treglia]

Haven't tried to troubleshoot the problem, but your code works fine for me.

Looks like I'm running a slightly older versions of packages (notably, for
raster). My session info is below.  Here's my session info in case it helps:

R version 3.1.2 (2014-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] snow_0.3-13   raster_2.2-31 sp_1.0-15

loaded via a namespace (and not attached):
[1] grid_3.1.2      lattice_0.20-29

-Mike T

On Fri, Feb 27, 2015 at 8:26 AM, <Bastien.Ferland-Raymond at mffp.gouv.qc.ca>
wrote:

> Dear all,
>
> I wrote a code last year that was running well.  I've retried the same
> code this month and it's not working anymore.  The problem arise from using
> cluster to do resampling in the raster package on multiple threads.  I've
> tried on two computers, both have the problem.
>
> Here is a reproducible example :
>
> ###
>
> library(raster)
> #Loading required package: sp
>  ## prepare the test rasters
> r1 <- raster(nrows=1000, ncols=1000, xmn=0, xmx=1000)
> set.seed(123)
> values(r1) <- round(rnorm(1000000,100,20))
> r2 <- raster(nrows=1000, ncols=1000, xmn=.2, xmx=1000.2)
>  ## testing resample without multicore
> resamp.single <- resample(r1, r2)
>  ## testing resample with multicore
> beginCluster(11)
> #Loading required namespace: snow
> resamp.multi <- resample(r1, r2)
> #Using cluster with 11 nodes
> #Error in UseMethod("recvOneData") :
> # no applicable method for 'recvOneData' applied to an object of class
> "c('SOCKcluster', 'cluster')"
> endCluster()
> #Error in UseMethod("stopCluster") :
> # no applicable method for 'stopCluster' applied to an object of class
> "c('SOCKcluster', 'cluster')"
>  sessionInfo()
> #R version 3.1.2 (2014-10-31)
> #Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> #locale:
> #[1] LC_COLLATE=French_Canada.1252  LC_CTYPE=French_Canada.1252
> #[3] LC_MONETARY=French_Canada.1252 LC_NUMERIC=C
> #[5] LC_TIME=French_Canada.1252
>
> #attached base packages:
> #[1] stats     graphics  grDevices utils     datasets  methods   base
>
> #other attached packages:
> #[1] raster_2.3-24 sp_1.0-17
>
> #loaded via a namespace (and not attached):
> #[1] grid_3.1.2      lattice_0.20-30 snow_0.3-13
>
>
> Any idea what the problem is?
>
> Thanks
>
> Bastien Ferland-Raymond, M.Sc. Stat., M.Sc. Biol.
> Division des orientations et projets spéciaux
> Direction des inventaires forestiers
> Ministère des Forêts, de la Faune et des Parcs
>
>
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>
>
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>

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