/var/log/mysql# more error.log
2020-04-27T13:58:57.667314Z 0 [Note] Giving 6 client threads a chance to die gracefully
2020-04-27T13:58:57.667362Z 0 [Note] Shutting down slave threads
2020-04-27T13:58:59.667431Z 0 [Note] Forcefully disconnecting 1 remaining clients
2020-04-27T13:58:59.667450Z 0 [Warning] /usr/sbin/mysqld: Forcing close of thread 4 user: 'sguil'
2020-04-27T13:58:59.667479Z 0 [Note] Event Scheduler: Purging the queue. 0 events
2020-04-27T14:08:58.078107Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-04-27T14:08:58.078150Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2020-04-27T14:08:58.079471Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.29-0ubuntu0.16.04.1-log) starting as process 11264 ...
2020-04-27T14:08:58.083480Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-04-27T14:08:58.083505Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-04-27T14:08:58.083509Z 0 [Note] InnoDB: Uses event mutexes
2020-04-27T14:08:58.083512Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-04-27T14:08:58.083515Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
2020-04-27T14:08:58.083518Z 0 [Note] InnoDB: Using Linux native AIO
2020-04-27T14:08:58.083703Z 0 [Note] InnoDB: Number of pools: 1
2020-04-27T14:08:58.083791Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-04-27T14:08:58.085049Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-04-27T14:08:58.091664Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-04-27T14:08:58.093393Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-04-27T14:08:58.104767Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2020-04-27T14:08:58.105741Z 0 [Note] InnoDB: Log scan progressed past the checkpoint lsn 1152013864
2020-04-27T14:08:58.105750Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 1152013873
2020-04-27T14:08:58.105754Z 0 [Note] InnoDB: Database was not shutdown normally!
2020-04-27T14:08:58.105757Z 0 [Note] InnoDB: Starting crash recovery.
2020-04-27T14:08:58.222713Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2020-04-27T14:08:58.222733Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2020-04-27T14:08:58.222767Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2020-04-27T14:08:58.242746Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2020-04-27T14:08:58.243478Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2020-04-27T14:08:58.243488Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2020-04-27T14:08:58.243812Z 0 [Note] InnoDB: 5.7.29 started; log sequence number 1152013873
2020-04-27T14:08:58.243993Z 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2020-04-27T14:08:58.244082Z 0 [Note] Plugin 'FEDERATED' is disabled.
2020-04-27T14:08:58.246032Z 0 [Note] InnoDB: Buffer pool(s) load completed at 200427 14:08:58
2020-04-27T14:08:58.249204Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
2020-04-27T14:08:58.249215Z 0 [Note] Skipping generation of SSL certificates as certificate files are present in data directory.
2020-04-27T14:08:58.249780Z 0 [Warning] CA certificate ca.pem is self signed.
2020-04-27T14:08:58.249817Z 0 [Note] Skipping generation of RSA key pair as key files are present in data directory.
2020-04-27T14:08:58.249869Z 0 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
2020-04-27T14:08:58.249877Z 0 [Note] - '127.0.0.1' resolves to '127.0.0.1';
2020-04-27T14:08:58.249895Z 0 [Note] Server socket created on IP: '127.0.0.1'.
2020-04-27T14:08:58.255496Z 0 [Note] Event Scheduler: Loaded 0 events
2020-04-27T14:08:58.255625Z 0 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.7.29-0ubuntu0.16.04.1-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu)
2020-04-27T14:08:58.910973Z 2 [Note] Access denied for user 'root'@'localhost' (using password: NO)
2020-04-27T16:06:17.697699Z 216 [ERROR] /usr/sbin/mysqld: Incorrect key file for table './securityonion_db/event_xxxxxxx@002dens160_20200415.MYI'; try to repair it
2020-04-27T16:24:00.380646Z 12 [Note] Aborted connection 12 to db: 'securityonion_db' user: 'sguil' host: 'localhost' (Got an error reading communication packets)