Asterisk14 question: shutdown

Asterisk always shutdown.How to fix this problem?

Thanks!

Logs as following:

[2018-08-08 10:26:40] VERBOSE[10918] asterisk.c: Waiting for inactivity to perform halt…
[2018-08-08 10:26:41] ERROR[10969] manager.c: Unable to process manager action ‘login’. Asterisk is shutting down.
[2018-08-08 10:26:41] ERROR[10969] manager.c: Unable to process manager action ‘Command’. Asterisk is shutting down.
[2018-08-08 10:26:41] ERROR[10969] manager.c: Unable to process manager action ‘Command’. Asterisk is shutting down.
[2018-08-08 10:26:41] ERROR[10992] manager.c: Unable to process manager action ‘login’. Asterisk is shutting down.
[2018-08-08 10:26:41] ERROR[10992] manager.c: Unable to process manager action ‘Command’. Asterisk is shutting down.
[2018-08-08 10:26:41] ERROR[10992] manager.c: Unable to process manager action ‘Command’. Asterisk is shutting down

Don’t request a shutdown!

You have provided no evidence as to the cause of the shutdown.

As far as I know, controlled shutdowns have to be requested.

This one looks like it was a fully controlled slow shutdown.