Thanks Malcolm, But it does seem to solve the problem.
On Mon, Nov 11, 2013 at 6:48 PM, Cook, Malcolm <m...@stowers.org> wrote: > Karl, > > I have the following notes to self that may be pertinent: > > options(java.parameters= > ## Must preceed `library(XLConnect)` in order to prevent "Java > ## requested System.exit(130), closing R." which happens when > ## rJava quits R upon trapping INT (control-c), as is done by > ## XLConnect (and playwith?), below. (c.f.: > ## https://www.rforge.net/bugzilla/show_bug.cgi?id=237) > "-Xrs") > > > ~Malcolm > > > > >-----Original Message----- > >From: r-devel-boun...@r-project.org [mailto: > r-devel-boun...@r-project.org] On Behalf Of Karl Forner > >Sent: Monday, November 11, 2013 11:41 AM > >To: r-devel@r-project.org > >Cc: Martin Studer > >Subject: [Rd] problem using rJava with parallel::mclapply > > > >Dear all, > > > >I got an issue trying to parse excel files in parallel using XLConnect, > the > >process hangs forever. > >Martin Studer, the maintainer of XLConnect kindly investigated the issue, > >identified rJava as a possible cause of the problem: > > > >This does not work (hangs): > >library(parallel) > >require(rJava) > >.jinit() > >res <- mclapply(1:2, function(i) { > > J("java.lang.Runtime")$getRuntime()$gc() > > 1 > > }, mc.cores = 2) > > > >but this works: > >library(parallel) > >res <- mclapply(1:2, function(i) { > > require(rJava) > > .jinit() > > J("java.lang.Runtime")$getRuntime()$gc() > > 1 > >}, mc.cores = 2) > > > >To cite Martin, it seems to work with mclapply when the JVM process is > >initialized after forking. > > > >Is this a bug or a limitation of rJava ? > >Or is there a good practice for rJava clients to avoid this problem ? > > > >Best, > >Karl > > > >P.S. > >> sessionInfo() > >R version 3.0.1 (2013-05-16) > >Platform: x86_64-unknown-linux-gnu (64-bit) > > > >locale: > > [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C > > [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 > > [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 > > [7] LC_PAPER=C LC_NAME=C > > [9] LC_ADDRESS=C LC_TELEPHONE=C > >[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C > > > >attached base packages: > >[1] stats graphics grDevices utils datasets methods base > > > >loaded via a namespace (and not attached): > >[1] tools_3.0.1 > > > > [[alternative HTML version deleted]] > > > >______________________________________________ > >R-devel@r-project.org mailing list > >https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
