[R-sig-hpc] doSMP warnings and crash on WinXP

[Markus Schmidberger]

I have some similar problems and there was a similar post in R-sig-hpc.
Using the multicore or snow package in combination with Rstudio creates
some strange error. As workers additional Rstudio sessions will be
started. I am currently figuring out what is going wrong.

Best
Markus

Am Sonntag, den 26.06.2011, 14:53 -0400 schrieb Cedrick Johnson:
> I think I found out what was causing the problem and it seems to be 
> working now for the time being:
> 
> c:\Documents and Settings\username\Local Settings\Temp
> 
> In the directory boost_interprocess when I create the workers using 
> startWorkers a file named: doSMP1(Shm) gets created. When things are 
> working normally, after I issue stopWorkers this file is supposed to be 
> deleted. What happened previously was this file did not get deleted and 
> thus why I got the original warnings (and RStudio crashed) below.
> 
> I manually just cleaned out the temp folder, restarted and everything 
> appears to be working normally now.
> 
> Thanks
> c
> 
> 
> Original Message >>>>
> Howdy-
> 
> When I first initialize a doSMP object (specifying two cores) as below,
> within RStudio (latest) it crashes the app. I brought up the regular R
> console (2.13.0) and tried to do the same thing but received some
> interesting warnings:
> 
>   >  library(doSMP)
> Loading required package: foreach
> Loading required package: iterators
> Loading required package: codetools
> foreach: simple, scalable parallel programming from Revolution Analytics
> Use Revolution R for scalability, fault tolerance and more.
> http://www.revolutionanalytics.com  <http://www.revolutionanalytics.com/>
> Loading required package: revoIPC
>   >  tmp = startWorkers(2)
> Warning messages:
> 1: In startWorkers(2) : there is an existing doSMP session using doSMP1
> 2: In startWorkers(2) : there is an existing doSMP session using doSMP2
>   >
> 
> Here's my dillemma. Where is said existing doSMP session? Could it be a
> "dirty" file leftover somewhere from a previous call that's causing this
> to 1) crash RStudio and 2) generate these warnings? A quick look at the
> processlist doesn't show anything running. I've even tried doing this
> after a clean reboot with the same error.
> 
> SessionInfo:
> 
> R version 2.13.0 (2011-04-13)
> Platform: i386-pc-mingw32/i386 (32-bit)
> 
> locale:
> [1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
> States.1252
> [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
> [5] LC_TIME=English_United States.1252
> 
> attached base packages:
> [1] stats     graphics  grDevices datasets  utils     methods   base
> 
> other attached packages:
> [1] doSMP_1.0-1     revoIPC_1.0-3   foreach_1.3.2   codetools_0.2-8
> iterators_1.0.4
> [6] rcom_2.2-3.1    rscproxy_1.3-1
> 
> loaded via a namespace (and not attached):
> [1] tools_2.13.0
> 
> Thanks for any guidance.
> 
> c
> 
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-- 
Dr. rer. nat. Markus Schmidberger 
Senior Community Manager 

Cloudnumbers.com GmbH
Chausseestraße 6
10119 Berlin 

www.cloudnumbers.com 
E-Mail: markus.schmidberger at cloudnumbers.com 


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