See comments section for details:

http://vmsqe.sfbay/nightly/mantis/DTWS/results/01-11-05/ServerVM/linux-i386/mixed/Gc_Baseline-Xconc/RT_PLUMHALL-NIGHTLY-Gc_Baseline-Xconc-ServerVM-mixed-linux-i386-2005-01-12-02-26-57/analysis.html

Archeological digs in progress for learning recent history of bug;
this space will be updated with findings from those digs.
###@###.### 2005-1-13 01:24:33 GMT

Also occurred here, same symptoms (no hs_err* file, no HotSpot
error message, NOTE, exact same machine too, except this
time it's with the Client VM):

http://vmsqe.sfbay/nightly/mantis/DTWS/results/01-07-05/ClientVM/linux-i386/mixed/Gc_Baseline-Xconc/RT_QUICK-NIGHTLY-Gc_Baseline-Xconc-ClientVM-mixed-linux-i386-2005-01-08-00-16-45/analysis.html

[Enter:javasoft.sqe.tests.lang.fpl038.fpl03802m2.fpl03802m2]
Memory fault (core dumped)

Note also that CMS nightly testing uses the following JVM flags:

-XX:-PrintVMOptions -XX:+UseConcMarkSweepGC -XX:+CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled -XX:+ExplicitGCInvokesConcurrent
###@###.### 2005-1-13 01:56:34 GMT