Shouldent the original process die after it starts the new process? I see another server start up, but the old one hang around:

Log:
2010/11/03 07:16:41 [notice] 54825#0: signal 12 (SIGUSR2) received, changing binary
2010/11/03 07:16:41 [notice] 54825#0: changing binary
2010/11/03 07:16:41 [notice] 54825#0: start new binary process 54951
2010/11/03 07:16:41 [notice] 54951#0: using the "epoll" event method
2010/11/03 07:16:41 [notice] 54951#0: getrlimit(RLIMIT_NOFILE): 1024:1024
2010/11/03 07:16:41 [notice] 54951#0: start worker processes
2010/11/03 07:16:41 [notice] 54951#0: start worker process 54952
2010/11/03 07:16:41 [notice] 54951#0: start worker process 54953

Before:
# ps -ef | grep nginx
root 54825 1 0 18:09 ? 00:00:00 nginx: master process /opt/local/contrib/sbin/nginx -p /var/log/nginx
www-data 54932 54825 0 18:15 ? 00:00:00 nginx: worker process
www-data 54933 54825 0 18:15 ? 00:00:00 nginx: worker process

After:
# ps -ef | grep nginx
root 54825 1 0 18:09 ? 00:00:00 nginx: master process /opt/local/contrib/sbin/nginx -p /var/log/nginx
www-data 54932 54825 0 18:15 ? 00:00:00 nginx: worker process
www-data 54933 54825 0 18:15 ? 00:00:00 nginx: worker process
root 54951 54825 0 18:16 ? 00:00:00 nginx: master process /opt/local/contrib/sbin/nginx -p /var/log/nginx
www-data 54952 54951 0 18:16 ? 00:00:00 nginx: worker process
www-data 54953 54951 0 18:16 ? 00:00:00 nginx: worker process