To answer your questions, I dont know of any scheduled service running in that time frame. This has been just a headless server ive had running since about august. I just set it up and havnt touched it since. There is no backups on this server so that wouldnt cause it. If there was a scheduled task honestly i wouldnt know. All i know is that i was not manually stopping it, and this has just started recently as you have seen in the logs.
Here is the output of that command you provided.
-- Logs begin at Fri 2021-03-19 17:07:10 EDT, end at Sat 2021-03-20 13:56:15 EDT. --
Mar 19 17:08:49 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 156.
Mar 19 17:08:49 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 156.
Mar 19 17:08:51 raspberrypi Plex Media Server[1030]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 19 17:08:51 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 19 17:08:51 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 19 17:08:56 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 19 17:08:56 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 1.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 19 17:08:56 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 2600 and the job result is done.
Mar 19 17:08:56 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 2600.
Mar 19 17:08:56 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 2600.
Mar 19 17:08:56 raspberrypi Plex Media Server[1226]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 19 17:08:56 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 19 17:08:56 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 19 17:09:01 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 19 17:09:01 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 2.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 19 17:09:01 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 3055 and the job result is done.
Mar 19 17:09:01 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 3055.
Mar 19 17:09:01 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 3055.
Mar 19 17:09:01 raspberrypi Plex Media Server[1479]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 19 17:09:01 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 19 17:09:01 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 19 17:09:06 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 19 17:09:06 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 3.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 19 17:09:06 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 3145 and the job result is done.
Mar 19 17:09:06 raspberrypi systemd[1]: plexmediaserver.service: Start request repeated too quickly.
Mar 19 17:09:06 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 19 17:09:06 raspberrypi systemd[1]: Failed to start Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished with a failure.
--
-- The job identifier is 3145 and the job result is failed.
Mar 19 17:26:36 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 3460.
Mar 19 17:26:36 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 3460.
Mar 19 23:02:27 raspberrypi Plex Media Server[2418]: Dolby, Dolby Digital, Dolby Digital Plus, Dolby TrueHD and the double D symbol are trademarks of Dolby Laboratories.
Mar 20 08:00:47 raspberrypi systemd[1]: Stopping Plex Media Server...
-- Subject: A stop job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 7513.
Mar 20 08:00:48 raspberrypi systemd[1]: plexmediaserver.service: Succeeded.
-- Subject: Unit succeeded
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has successfully entered the 'dead' state.
Mar 20 08:00:48 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 7513 and the job result is done.
Mar 20 08:01:09 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 7633.
Mar 20 08:01:09 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 7633.
Mar 20 08:01:09 raspberrypi Plex Media Server[24127]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 20 08:01:09 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 20 08:01:09 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 20 08:01:15 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 20 08:01:15 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 1.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 20 08:01:15 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 7723 and the job result is done.
Mar 20 08:01:15 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 7723.
Mar 20 08:01:15 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 7723.
Mar 20 08:01:15 raspberrypi Plex Media Server[24159]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 20 08:01:15 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 20 08:01:15 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 20 08:01:20 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 20 08:01:20 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 2.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 20 08:01:20 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 7813 and the job result is done.
Mar 20 08:01:20 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 7813.
Mar 20 08:01:20 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 7813.
Mar 20 08:01:20 raspberrypi Plex Media Server[24171]: /usr/lib/plexmediaserver/Plex Media Server: error while loading shared libraries: libicudataplex.so.67: cannot open shared object file: No such file or directory
Mar 20 08:01:20 raspberrypi systemd[1]: plexmediaserver.service: Main process exited, code=exited, status=127/n/a
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit plexmediaserver.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 127.
Mar 20 08:01:20 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 20 08:01:25 raspberrypi systemd[1]: plexmediaserver.service: Service RestartSec=5s expired, scheduling restart.
Mar 20 08:01:25 raspberrypi systemd[1]: plexmediaserver.service: Scheduled restart job, restart counter is at 3.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- Automatic restarting of the unit plexmediaserver.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Mar 20 08:01:25 raspberrypi systemd[1]: Stopped Plex Media Server.
-- Subject: A stop job for unit plexmediaserver.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit plexmediaserver.service has finished.
--
-- The job identifier is 7903 and the job result is done.
Mar 20 08:01:25 raspberrypi systemd[1]: plexmediaserver.service: Start request repeated too quickly.
Mar 20 08:01:25 raspberrypi systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit plexmediaserver.service has entered the 'failed' state with result 'exit-code'.
Mar 20 08:01:25 raspberrypi systemd[1]: Failed to start Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished with a failure.
--
-- The job identifier is 7903 and the job result is failed.
Mar 20 08:43:06 raspberrypi systemd[1]: Starting Plex Media Server...
-- Subject: A start job for unit plexmediaserver.service has begun execution
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has begun execution.
--
-- The job identifier is 8478.
Mar 20 08:43:06 raspberrypi systemd[1]: Started Plex Media Server.
-- Subject: A start job for unit plexmediaserver.service has finished successfully
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit plexmediaserver.service has finished successfully.
--
-- The job identifier is 8478.
Mar 20 10:31:17 raspberrypi Plex Media Server[25616]: Dolby, Dolby Digital, Dolby Digital Plus, Dolby TrueHD and the double D symbol are trademarks of Dolby Laboratories.