Bigapps: app crashed with incgc

There is a crash in vm when running an app after 6 days with Xincgc on x64 Linux.
The jdk used in the test is 1.6.0_03-ea-b02.

hostname: jtg-amd5.sfbay
OS: Red Hat Enterprise Linux Server release 5 (Tikanga)
jdk version: /usr/j2se/bin/java -server -version
java version "1.6.0_03-ea"
Java(TM) SE Runtime Environment (build 1.6.0_03-ea-b02)
Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_03-ea-b02, mixed mode)

vm option: "-server -Xincgc"
log file location: /bt/atgrun.22097.-server

Unexpected Error
SIGSEGV (0xb) at pc=0x00002aaaaae3e2a9, pid=7901, tid=1079040320
To debug, run 'gdb /proc/7901/exe 7901'; then switch to thread 1079040320

(gdb) thread 111
[Switching to thread 111 (Thread 1079040320 (LWP 7905))]#0 0x0000003ea4c94591 in __nanosleep_nocancel () from /lib64/libc.so.6
(gdb) where
#0 0x0000003ea4c94591 in __nanosleep_nocancel () from /lib64/libc.so.6
#1 0x0000003ea4c943b4 in sleep () from /lib64/libc.so.6
#2 0x00002aaaab0e23bf in os::message_box () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#3 0x00002aaaab23e1b6 in VMError::show_message_box () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#4 0x00002aaaab23dd2d in VMError::report_and_die () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#5 0x00002aaaab0e430c in JVM_handle_linux_signal () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#6 0x00002aaaab0e115e in signalHandler () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#7 <signal handler called>
#8 0x00002aaaaae3e2a9 in MarkFromRootsClosure::do_bit () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#9 0x00002aaaaadae680 in BitMap::iterate () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#10 0x00002aaaaae36858 in CMSCollector::do_marking_st () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#11 0x00002aaaaae35576 in CMSCollector::markFromRoots () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#12 0x00002aaaaae329ec in CMSCollector::collect_in_background () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#13 0x00002aaaaae42f25 in ConcurrentMarkSweepThread::run () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#14 0x00002aaaab0e2f0a in java_start () from /usr/j2se/jre/lib/amd64/server/libjvm.so
#15 0x0000003ea58061b5 in start_thread () from /lib64/libpthread.so.0
#16 0x0000003ea4ccd39d in clone () from /lib64/libc.so.6
#17 0x0000000000000000 in ?? ()