java is core dumping on osol_1002-124.
The core dump can be accessed via NFS at:
/net/irperf.ireland/export/work/core_images/Thu.Oct.15.2009.oaf603.volano_server_tuned.osol_1002-124

Release Info:

                       OpenSolaris Development snv_124 X86
            Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
                         Use is subject to license terms.
                            Assembled 25 September 2009


pstack output:

core 'core.java.1045.1255635662' of 1045: /usr/bin/java -server -Xms1600m -Xmx1600m -XX:+AggressiveHeap COM.vola
----------------- lwp# 1 --------------------------------
 feea1ff7 ???????? (2, 80470c4, 0, fee995f7, 8052260, 80479d8)
 fee9964c ???????? (2, 0, 8047130, 1, 8047134, 806a8ac)
 fee9979b ???????? (2, 0, 8047130)
 08058ae7 ContinueInNewThread (8052260, 50000, 0, 80479d8, 8047990) + 4f
 08051f59 main (0, 806b064, 8047a70) + aa1
 0805142a _start (6, 8047b6c, 8047b7a, 8047b82, 8047b8c, 8047b96) + 7a
----------------- lwp# 2 --------------------------------
 feea1fc7 ???????? ()


I've added the hs_err_pid* file to the core files.