Here is the hs_err:
;; Using jvm: "/export/local/common/jdk/baseline/solaris-i586/jre/lib/i386/server/libjvm.so"
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/tmp/jprt/P1/B/091209.jcoomes/source/src/share/vm/oops/methodOop.cpp:762), pid=19794, tid=22
# assert(_from_compiled_entry != NULL) failed: must be set
#
# JRE version: 7.0-b144
# Java VM: Java HotSpot(TM) Server VM (21.0-b15-internal-201105280912.jcoomes.hs21-b15-snapshot-fastdebug compiled mode solaris-x86 )
# Core dump written. Default location: /export/local/51455.HSX.PIT.VM+solaris-i586_bigapps__server_comp_Weblogic+medrec/results/weblogic/core or core.19794
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x0958a800): JavaThread "[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon [_thread_in_Java, id=22, stack(0x9877d000,0x987cd000)]

Stack: [0x9877d000,0x987cd000], sp=0x987c8410, free space=301k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1d49b86] void VMError::report(outputStream*)+0x902;; void VMError::report(outputStream*)+0x902
V [libjvm.so+0x1d4ad39] void VMError::report_and_die()+0x56d;; void VMError::report_and_die()+0x56d
V [libjvm.so+0xb117ba] void report_vm_error(const char*,int,const char*,const char*)+0x53a;; void report_vm_error(const char*,int,const char*,const char*)+0x53a
V [libjvm.so+0x17a7fd1] unsigned char*methodOopDesc::verified_code_entry()+0x36d;; unsigned char*methodOopDesc::verified_code_entry()+0x36d
V [libjvm.so+0x1ab5ba0] unsigned char*SharedRuntime::handle_wrong_method_ic_miss(JavaThread*)+0x770;; unsigned char*SharedRuntime::handle_wrong_method_ic_miss(JavaThread*)+0x770
v ~RuntimeStub::ic_miss_stub