RAS: Tomcat hang with 1.4.1-rc-b17 on linux redhat 7.2 64bits

JDK version
=============
java version "1.4.1-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-rc-b17)
Java HotSpot(TM) 64-Bit Core VM (build 1.4.1-rc-b17, interpreted mode)

Platform
=============
Linux jtg-it1.SFBay.Sun.COM 2.4.9-18smp #1 SMP ia64 unknown

Error message
=============
Unexpected Signal: 4, PC: 0x20000000001b1310, PID: 3147
An error has just occurred, do you want to debug the problem?

Notes
=============
*We still keep the hanging process on jtg-it1 and go /bt to check the test output.
*How to reproduce bug:
telnet to the hosts shown in web for linux test machine with root/[host name] as id/passwd
goto /bt to execute script and /bs to get the running results
****for example:****
telnet to jtg-i114 with root/jtg-it1 as id/passwd
execute /bs/runtomcat.ksh -server
cd to /bt/tomcatxxx.xxx-server to get the results