Redis 6.0.16 under Debian 11 suddenly restarts

[Karim Jafarmadar]

I am running Redis on Debian with default settings. The server just suddenly restarted, see logs below. Any help why that happens would be appreciated!

807:M 19 Feb 2022 06:29:08.158 * Background saving terminated with success
807:signal-handler (1645248827) Received SIGTERM scheduling shutdown...
807:M 19 Feb 2022 06:33:47.522 # User requested shutdown...
807:M 19 Feb 2022 06:33:47.522 * Saving the final RDB snapshot before exiting.
807:M 19 Feb 2022 06:33:47.569 * DB saved on disk
807:M 19 Feb 2022 06:33:47.569 * Removing the pid file.
807:M 19 Feb 2022 06:33:47.569 * Removing the unix socket file.
807:M 19 Feb 2022 06:33:47.569 # Redis is now ready to exit, bye bye...
444750:C 19 Feb 2022 06:33:47.643 # WARNING supervised by systemd - you MUST set appropriate values for TimeoutStartSec and TimeoutStopSec in your service
 unit.
444750:C 19 Feb 2022 06:33:47.643 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
444750:C 19 Feb 2022 06:33:47.643 # Redis version=6.0.16, bits=64, commit=00000000, modified=0, pid=444750, just started
444750:C 19 Feb 2022 06:33:47.643 # Configuration loaded
444750:M 19 Feb 2022 06:33:47.644 * Running mode=standalone, port=6379.
444750:M 19 Feb 2022 06:33:47.644 # Server initialized
444750:M 19 Feb 2022 06:33:47.644 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.
overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
444750:M 19 Feb 2022 06:33:47.644 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usag
e issues with Redis. To fix this issue run the command 'echo madvise > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.lo
cal in order to retain the setting after a reboot. Redis must be restarted after THP is disabled (set to 'madvise' or 'never').
444750:M 19 Feb 2022 06:33:47.644 * Loading RDB produced by version 6.0.16
444750:M 19 Feb 2022 06:33:47.644 * RDB age 0 seconds
444750:M 19 Feb 2022 06:33:47.644 * RDB memory usage when created 3.00 Mb
444750:M 19 Feb 2022 06:33:47.645 * DB loaded from disk: 0.001 seconds
444750:M 19 Feb 2022 06:33:47.645 * Ready to accept connections
444750:M 19 Feb 2022 06:33:47.645 * The server is now ready to accept connections at /var/run/redis/redis.sock