Help! about JVM crash

I introduce the testing program on linux. At first, it launches a control java instance.(java -Dgid=rbecontroller -server -classpath......), then it launches four rbe processes on different separate JVM, (/j2sdk1.4.2_07/jre/bin/java -Xmn256m -XX:PermSize=128m -XX:MaxPermSize=128m -Drun=oracle-1.rbe.1 -Xms1024M -Xmx1024M -Djava.home=/home/oracle/j2sdk1.4.2_07/jre -Djava.library.path=null:/usr/lib -Djava.class.path=null...).

During longer time running, one rbe process will stop with no prompt, and the other three still run fine. If the rbe is dead, there's no pstack report. Each rbe is used to simulate operations. The function of each rbe is similiar. I don't know why it will crash and if it's a bug for JVM. Pleas give me some advice. I'm extremely confused by this problem.

JDK version is 1.4.2_07. Thanks a lot!

Regards,

Bill

[871 byte] By [billwonrya] at [2007-10-2 15:25:04]
# 1
Check if hotspot error log file hs_err_pidxxxx.log got created. This file would contain the stack trace of the thread that crashed.
poonambajaja at 2007-7-13 14:39:44 > top of Java-index,Java HotSpot Virtual Machine,Specifications...