Comment 27 for bug 361560

I have also experienced this bug. By following this advice from jonaz/Rusty, I haven't seen the error message since:

"Ran into the same problem. Following jonaz__ solution, with the exception that I killed the trackerd and tracker-indexer processes, deleted the contents of ~/.cache/tracker and ~/.local/share/tracker/data then logged out, and logged back in. Tracker indexer posted a notification that it was starting up." https://bugs.launchpad.net/ubuntu/+source/tracker/+bug/361560/comments/18