(mongodb >=1.13.0)
MongoDB\Driver\Monitoring\SDAMSubscriber::serverHeartbeatFailed — Notification method for a failed server heartbeat
$event): voidIf the subscriber is registered, this method is called when a server heartbeat (i.e. » hello command issued through » server monitoring) fails.
event (MongoDB\Driver\Monitoring\ServerHeartbeatFailedEvent)An event object encapsulating information about the failed server heartbeat.
没有返回值。