Ask for help: mysql restarts automatically when it is running. What does it mean to take a look at this print? - Codes Helper

Ask for help: mysql restarts automatically when it is running. What does it mean to take a look at this print?
2018-04-10T08:26:03.830775Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.20) starting as process 9836 ...
2018-04-10T08:26:03.923709Z 0 [Note] InnoDB: PUNCH HOLE support available
2018-04-10T08:26:03.923741Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-04-10T08:26:03.923747Z 0 [Note] InnoDB: Uses event mutexes
2018-04-10T08:26:03.923752Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2018-04-10T08:26:03.923756Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3
2018-04-10T08:26:03.923761Z 0 [Note] InnoDB: Using Linux native AIO
2018-04-10T08:26:03.924108Z 0 [Note] InnoDB: Number of pools: 1
2018-04-10T08:26:03.925903Z 0 [Note] InnoDB: Using CPU crc32 instructions
2018-04-10T08:26:03.942253Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2018-04-10T08:26:03.954056Z 0 [Note] InnoDB: Completed initialization of buffer pool
2018-04-10T08:26:03.956138Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2018-04-10T08:26:03.998843Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2018-04-10T08:26:04.024525Z 0 [Note] InnoDB: Log scan progressed past the checkpoint lsn 752928971
2018-04-10T08:26:04.024542Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 752928980
2018-04-10T08:26:04.024548Z 0 [Note] InnoDB: Database was not shutdown normally!
2018-04-10T08:26:04.024553Z 0 [Note] InnoDB: Starting crash recovery.
2018-04-10T08:26:04.866676Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2018-04-10T08:26:04.866701Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2018-04-10T08:26:04.866740Z 0 [Note] InnoDB: Setting file "./ibtmp1" size to 12 MB. Physically writing the file full; Please wait ...
2018-04-10T08:26:05.051324Z 0 [Note] InnoDB: File "./ibtmp1" size is now 12 MB.
2018-04-10T08:26:05.052309Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2018-04-10T08:26:05.052325Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2018-04-10T08:26:05.052622Z 0 [Note] InnoDB: Waiting for purge to start
2018-04-10T08:26:05.102762Z 0 [Note] InnoDB: 5.7.20 started; log sequence number 752928980
2018-04-10T08:26:05.103027Z 0 [Note] Plugin "FEDERATED" is disabled.
2018-04-10T08:26:05.103311Z 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2018-04-10T08:26:05.115285Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
2018-04-10T08:26:05.135202Z 0 [Warning] CA certificate ca.pem is self signed.
2018-04-10T08:26:05.145658Z 0 [Note] Server hostname (bind-address): "*"; port: 3306
2018-04-10T08:26:05.145697Z 0 [Note] IPv6 is available.
2018-04-10T08:26:05.145708Z 0 [Note]   - "::" resolves to "::";
2018-04-10T08:26:05.146243Z 0 [Note] Server socket created on IP: "::".
2018-04-10T08:26:05.272868Z 0 [Note] Event Scheduler: Loaded 0 events
2018-04-10T08:26:05.273051Z 0 [Note] /usr/sbin/mysqld: ready for connections.
Version: "5.7.20"  socket: "/var/lib/mysql/mysql.sock"  port: 3306  MySQL Community Server (GPL)
2018-04-10T08:26:05.273062Z 0 [Note] Executing "SELECT * FROM INFORMATION_SCHEMA.TABLES;" to get a list of tables using the deprecated partition engine. You may use the startup option "--disable-partition-engine-check" to skip this check.
2018-04-10T08:26:05.273066Z 0 [Note] Beginning of list of non-natively partitioned tables
2018-04-10T08:26:05.375070Z 0 [Note] End of list of non-natively partitioned tables
2018-04-10T08:26:05.967058Z 0 [Note] InnoDB: Buffer pool(s) load completed at 180410 16:26:05