Fails to index anything but was "successful"
tracker-2.2.2-1.fc30.x86_64 tracker-miners-2.2.2-1.fc30.x86_64
$ tracker index --file '/home/hadess/Documents/e-Books tests/Boneshaker_Priest_1372449942.epub'
(Re)indexing file was successful
Aug 02 21:56:02 classic tracker-miner-f[2322]: (Sparql buffer) Error in task 0 (file:///home/hadess/Documents) of the array-update: UNIQUE constraint failed: nie:DataObject.nie:url (strerror of errno (not necessarily related): Resource temporarily unavailable)
Aug 02 21:56:02 classic tracker-miner-f[2322]: Could not execute sparql: UNIQUE constraint failed: nie:DataObject.nie:url (strerror of errno (not necessarily related): Resource temporarily unavailable)
Aug 02 21:56:02 classic tracker-miner-f[2322]: Parent 'file:///home/hadess/Documents' not indexed yet
Aug 02 21:56:04 classic systemd[1680]: Starting Tracker metadata extractor...
Aug 02 21:56:04 classic systemd[1680]: Started Tracker metadata extractor.
Aug 02 21:56:05 classic tracker-miner-f[2322]: Parent 'file:///home/hadess/Documents/e-Books%20tests' not indexed yet
Aug 02 21:56:15 classic systemd[1680]: tracker-extract.service: Succeeded.