FULL PRODUCT VERSION :
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_03-b05, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux geo 2.6.21.6 #1 SMP Fri Nov 16 14:39:24 EST 2007 x86_64 AMD Opteron(tm) Processor 246 AuthenticAMD GNU/Linux

EXTRA RELEVANT SYSTEM CONFIGURATION :
Headless machine

A DESCRIPTION OF THE PROBLEM :
Our web gis server, GeoServer, the jvm randomly crashes on the above box while trying to render maps on a graphics context.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
The problem occurs randomly. We don't have a specific way to reproduce it consistently.


ERROR MESSAGES/STACK TRACES THAT OCCUR :

*** glibc detected *** /opt/sun-java-1.6.0//bin/java: double free or corruption (!prev): 0x00002aaad8671150 ***
======= Backtrace: =========
/lib/libc.so.6[0x2b2543b03aad]
/lib/libc.so.6(cfree+0x76)[0x2b2543b05796]
/opt/actual/jdk1.6.0_03/jre/lib/amd64/libdcpr.so[0x2aaaddae0b4d]
/opt/actual/jdk1.6.0_03/jre/lib/amd64/libdcpr.so(Java_sun_dc_pr_PathStroker_dispose+0x71)[0x2aaaddae4e31]
[0x2aaaab8cbc85]

I can provide a fuller listing with all the libs and jars involved.

REPRODUCIBILITY :
This bug can be reproduced often.