Failed to start Tracker

I'm getting the following error on my server. I don't know if it's an error or not. Everything is normal on my server now

Jul 10 01:07:51 testserver systemd[1]: Started Process Core Dump (PID 37765/UID 0).
Jul 10 01:07:51 testserver systemd-coredump[37766]: Resource limits disable core dumping for process 37751 (tracker-extract).
Jul 10 01:07:51 testserver systemd-coredump[37766]: Process 37751 (tracker-extract) of user 0 dumped core.
Jul 10 01:07:51 testserver systemd[7337]: tracker-extract.service: Main process exited, code=dumped, status=31/SYS
Jul 10 01:07:51 testserver systemd[1]: systemd-coredump@184-37765-0.service: Succeeded.
Jul 10 01:07:51 testserver systemd[7337]: tracker-extract.service: Failed with result 'core-dump'.
Jul 10 01:07:51 testserver systemd[7337]: Failed to start Tracker metadata extractor.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Service RestartSec=100ms expired, scheduling restart.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Scheduled restart job, restart counter is at 4.
Jul 10 01:07:52 testserver systemd[7337]: Stopped Tracker metadata extractor.
Jul 10 01:07:52 testserver abrt-dump-journal-core[4617]: Failed to obtain all required information from journald
Jul 10 01:07:52 testserver systemd[7337]: Starting Tracker metadata extractor...
Jul 10 01:07:52 testserver journal[37774]: Setting scheduler policy to SCHED_IDLE
Jul 10 01:07:52 testserver journal[37774]: Setting priority nice level to 19
Jul 10 01:07:52 testserver journal[37774]: tracker_module_manager_load_modules: assertion 'initialized == TRUE' failed
Jul 10 01:07:52 testserver systemd[1]: Started Process Core Dump (PID 37788/UID 0).
Jul 10 01:07:52 testserver systemd-coredump[37789]: Resource limits disable core dumping for process 37774 (tracker-extract).
Jul 10 01:07:52 testserver systemd-coredump[37789]: Process 37774 (tracker-extract) of user 0 dumped core.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Main process exited, code=dumped, status=31/SYS
Jul 10 01:07:52 testserver systemd[1]: systemd-coredump@185-37788-0.service: Succeeded.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Failed with result 'core-dump'.
Jul 10 01:07:52 testserver systemd[7337]: Failed to start Tracker metadata extractor.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Service RestartSec=100ms expired, scheduling restart.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Scheduled restart job, restart counter is at 5.
Jul 10 01:07:52 testserver systemd[7337]: Stopped Tracker metadata extractor.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Start request repeated too quickly.
Jul 10 01:07:52 testserver systemd[7337]: tracker-extract.service: Failed with result 'core-dump'.
Jul 10 01:07:52 testserver systemd[7337]: Failed to start Tracker metadata extractor.
Jul 10 01:07:52 testserver abrt-dump-journal-core[4617]: Failed to obtain all required information from journald

See, for example: