Hi Clint -
Are you receiving an error message? If so, could you supply a screen shot of it? The index will get rebuilt whenever Tableau Server starts, so I'm wondering if something might have occurred in the upgrade (just a guess), prior to you restoring from the backup. Also, did you look at the reindex option on the GUI. I'm curious to know if this option is available based on the condition you mention. Depending upon server content, it can take some time to re-index, but 17 hours is certainly the extreme.
thanks for your reply. There is no error message at all. I can't get to the option on the GUI since it doesn't load anything but a blank page. I'm considering restoring a smaller backup of another environment to see if i have the same issue. On the log file, it just shows the last step as "refreshing index.........." and that's the last entry. I'll post the results of my attempt to load the smaller backup.