R crashes with package SJava; was [R] Memory leakage?

[Hotz, T.]

Dear all,

Maybe this has something to do with R crashing?
When my R version crashes, there is Rgui.exe still
running in the background (i.e. W2K's task manager
recognises it only as a process, which apparently 
is using almost 100% of the CPU).

I can reproduce that by "using" the SJava package 
(from Brian Ripley's homepage, as suggested on 
http://www.omegahat.org/RSJava/). When loading the 
package, and running the ttest example, my Rgui.exe 
crashes, and I end up with the process Rgui.exe 
still alive using the CPU extensively. The same 
happens on my stand-alone machine at home (with the 
same OS and R versions but newest Sun JDK).

Any comments greatly appreciated.

Best wishes

Thomas

P.S. At the end an error message appears, but I'm not 
able to sink it. I could run it in a terminal - but 
are there other possibilities?

--- R code pasted into Rgui

rm(list=ls())
# see below for ouput,
# used sink to get probale error messages
# (doesn't work; can one "sink" error messages?)
sink("k:/SJavaFault.rout")
version
# load SJava
library(SJava)
library(help=SJava)
.JavaInit()
# try SJava
.Java("Math","PI")
# load example
source("d:/R/rw1062/library/SJava/examples/ttest.R")
x<-rnorm(10)
y<-rnorm(10,1)
# test example, crashes after specifying x and y in the dialog and pressing "Submit"
dialog.t.test()
# Rgui.exe still running as a process, but not an application (according to task manager)


--- Output of sink and library(help=...)

         _              
platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    1              
minor    6.2            
year     2003           
month    01             
day      10             
language R              
using JAVA_HOME = Y:/Java Development Kit/Java2sdk1.4/jre 

[...]
Package: SJava
Version: 0.65
Date: 2002/07/17
Title: The Omegahat interface for R and Java.
Author: Duncan Temple Lang <duncan at research.bell-labs.com>, John
        Chambers <jmc at research.bell-labs.com>
Depends: R (>= 1.1.0)
Maintainer: Duncan Temple Lang <duncan at research.bell-labs.com>
Description: An interface from R to Java to create and call Java
        objects and methods.
License: GPL version 2 or newer. http://www.gnu.org/copyleft/gpl.html
URL: http://www.omegahat.org/RSJava, http://www.omegahat.org
        http://www.omegahat.org/bugs
Built: R 1.6.2; Win32; Thu Feb 27 19:18:38 GMTST 2003
[...]

[1] 3.141593
$id
[1] "1"

$value
$value$actionPerformed
function(ev) {
   cmd <- ev$getActionCommand()
   if(cmd == "Reset")
     reset()
   else {
     print(compute())
   }

  NULL
 }
<environment: 013B8AC4>


$className
character(0)

$targetClasses
character(0)

attr(,"class")
[1] "AnonymousRReference"

---

Thomas Hotz
Research Associate in Medical Statistics
University of Leicester
United Kingdom

Department of Epidemiology and Public Health
22-28 Princess Road West
Leicester
LE1 6TP
Tel +44 116 252-5410
Fax +44 116 252-5423

Division of Medicine for the Elderly
Department of Medicine
The Glenfield Hospital
Leicester
LE3 9QP
Tel +44 116 256-3643
Fax +44 116 232-2976


-----Original Message-----
From: Duncan Murdoch [mailto:dmurdoch at pair.com]
Sent: 03 May 2003 23:59
To: tshi at itsa.ucsf.edu
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Memory leakage?


On Sat, 03 May 2003 20:33:49 +0000, you wrote:

>I haven't tried re-installing windows yet, because it seems to be a big task 
>for me and also I kind of doubt that the problem is due to my own 
>computer(s), because the same problem happens to 3 different computers: one 
>Dell desktop in school runing Win2K and R 1.6.1, my Dell laptop runing Win 
>XP Professional Edition and R 1.7.0 and my new Dell desktop at home (just 
>bought less than a month and only a few basic softwares were installed) 
>runing Win XP Home Edition and R1.7.0.  (may be they're all from Dell :-)) 
>I'm still looking for the pattern of when this happens, but so far, it seems 
>to be random.

I don't think it's a Windows problem.  I've seen it occasionally, but
not reproducibly.  If you can figure out some sequence of operations
that reliably produces it, please let me know.

Duncan Murdoch

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