Everything externally facing is currently running on isda-maven1. There are two server stacks running, the Fisheye server (which is their own hacked-up Tomcat running out of /home/fisheye) and a conventional apache+tomcat setup that serves up Artifactory and OpenGrok.
If it breaks:
Try restarting; "/etc/init.d/web stop" will take down all of the above services, and "... start" will bring them all back. Some of them take quite a while to shut down, so make sure there are no running java processes before you restart.
If OpenGrok stops updating:
Every other hour, cron runs /home/opengrok/update-indices.sh, which logs to .../update-indices.log. All it's doing is a subversion checkout followed by a run of the update script; it should be fairly bombproof.
If Fisheye stops updating:
If it's not running at all, restart it per the above. Otherwise, everything is done via the GUI; the administration site is here, and you'll need the admin password, which is noted in /home/fisheye/README.access.