WordPress at a glance
action is not described

action_scheduler_unexpected_shutdown action-hook . WC 1.0

Usage

add_action( 'action_scheduler_unexpected_shutdown', 'action_function_name_106', 10, 2 );
function action_function_name_106( $action_id, $error ){
	// action...
}
$action_id
-
$error
-

Where the hook is called

ActionScheduler_FatalErrorMonitor::handle_unexpected_shutdown()
action_scheduler_unexpected_shutdown
woocommerce/packages/action-scheduler/classes/ActionScheduler_FatalErrorMonitor.php 49
do_action( 'action_scheduler_unexpected_shutdown', $this->action_id, $error );

Where in WP core the hook is used WooCommerce

woocommerce/packages/action-scheduler/classes/abstracts/ActionScheduler_Logger.php 55
add_action( 'action_scheduler_unexpected_shutdown', array( $this, 'log_unexpected_shutdown' ), 10, 2 );