tomcat process dies out...

[Krishna Kishore Thotakura]

hello,
 I am trying to setup multiple JVMs using mod_jk. the JVM running at port 8080
is okay. I'm having problem with the JVM running at port 8090. whenever, i log
out of my server machine(the machine where i am starting my apache and tomcat),
the tomcat process stops listening to the port 8090. Actually, the Tomcat(java)
threads are getting killed when i log out.

 Please let me know where i am going wrong?  i am starting tomcat1 
as ./startup.sh -f server_1.xml

thanks,
kishore.