If its useful, this is the extract of the Media Server log before it seemed to die:
‘Dec 18, 2017 22:41:39.101 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:41.349 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:41:41.365 [1928] DEBUG - Request: [10.0.0.219:59018 (Subnet)] GET / (43 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:41:41.365 [1928] DEBUG - (Capabilities) Platform ‘iOS’ not matched by plugin platform requirements
Dec 18, 2017 22:41:41.365 [3556] DEBUG - Completed: [10.0.0.219:59018] 200 GET / (43 live) TLS GZIP 2ms 1459 bytes (pipelined: 25)
Dec 18, 2017 22:41:41.380 [3560] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:41:41.380 [3876] DEBUG - Request: [10.0.0.219:59044 (Subnet)] GET /media/subscriptions/scheduled (43 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:41:41.380 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:41:41.380 [2076] DEBUG - Request: [10.0.0.219:59018 (Subnet)] GET /activities (43 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:41:41.380 [3556] DEBUG - Completed: [10.0.0.219:59018] 200 GET /activities (43 live) TLS GZIP 1ms 397 bytes (pipelined: 26)
Dec 18, 2017 22:41:42.441 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:42.722 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:41:42.722 [1928] DEBUG - Request: [10.0.0.96:54695 (Subnet)] POST /playQueues?continuous=0&recursive=0&shuffle=0&type=video&uri=library%3A%2F%2F21fb5601-18cc-42d1-961e-c0dab7ff8c11%2Fitem%2F%252Flibrary%252Fmetadata%252F94168 (43 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:41:42.972 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:45.780 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:46.310 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:49.118 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:49.649 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:52.459 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:52.989 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:55.797 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:56.327 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:59.135 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:41:59.666 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:02.476 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:03.006 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:05.814 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:06.345 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:09.153 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:09.683 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:12.493 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:13.024 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:15.832 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:16.362 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:19.170 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:19.700 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:22.511 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:23.041 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:25.849 [3160] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:26.379 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:27.612 [3160] ERROR - Soci Exception handled: sqlite3_statement_backend::loadOne: database is locked
Dec 18, 2017 22:42:27.612 [3560] DEBUG - Completed: [10.0.0.219:59043] 500 GET /media/subscriptions/scheduled (28 live) TLS GZIP 66788ms 405 bytes (pipelined: 1)
Dec 18, 2017 22:42:29.720 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:29.720 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:42:29.720 [2076] DEBUG - Request: [10.0.0.2:63249 (Subnet)] GET /status/sessions (28 live) Signed-in Token ()
Dec 18, 2017 22:42:33.058 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:36.397 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:39.737 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:43.076 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:46.414 [3876] WARN - Waited one whole second for a busy database.
Dec 18, 2017 22:42:48.177 [3876] ERROR - Soci Exception handled: sqlite3_statement_backend::loadOne: database is locked
Dec 18, 2017 22:42:48.177 [3560] DEBUG - Completed: [10.0.0.219:59044] 500 GET /media/subscriptions/scheduled (28 live) TLS GZIP 66786ms 405 bytes (pipelined: 13)
Dec 18, 2017 22:43:29.714 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:43:29.714 [3160] DEBUG - Request: [10.0.0.2:63250 (Subnet)] GET /status/sessions (29 live) Signed-in Token ()
Dec 18, 2017 22:43:54.961 [3556] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:43:54.961 [4600] DEBUG - Request: [10.0.0.219:59178 (Subnet)] POST /library/metadata?createdAt=1513524815&filename=2017-12-17%2015.33.35.jpg&locationID=8§ionID=2&type=13 (30 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:43:54.961 [3560] DEBUG - Completed: [10.0.0.219:59178] 404 POST /library/metadata?createdAt=1513524815&filename=2017-12-17%2015.33.35.jpg&locationID=8§ionID=2&type=13 (30 live) TLS GZIP 6ms 379 bytes (pipelined: 1)
Dec 18, 2017 22:43:55.164 [3560] DEBUG - Auth: authenticated user 1 as
Dec 18, 2017 22:43:55.164 [5056] DEBUG - Request: [10.0.0.1:59180 (Subnet)] GET / (34 live) TLS GZIP Signed-in Token ()
Dec 18, 2017 22:43:55.164 [5056] DEBUG - (Capabilities) Platform ‘iOS’ not matched by plugin platform requirements
Dec 18, 2017 22:45:48.501 [3940] DEBUG - Plex Tuner Service.exe exited.’