laravel command with mqtt client in background stop without error - laravel

Question

I have an laravel application in docker environment. In my application, I have a console command which will connect to a MQTT broker and subscribe to a certain topic, then command will handle message recieved from MQTT broker.
This is my handle() method in command class:
public function handle()
{
$this->logger->info('Start connecting to broker.');
$subscribeTopic = '#';
$mqtt = MQTT::connection(MqttClient::MQTT_SUBSCRIBE_CONNECTION);
// Using a infinite loop for re-creating new connection in case current connection is broken
while (true) {
try {
if (!$mqtt->isConnected()) {
$this->logger->info('Client is disconnected. Re-connecting.');
$mqtt->connect();
}
$mqtt->subscribe($subscribeTopic, $this->handleSubscriberCallback());
$mqtt->loop(true);
} catch (Exception $exception) {
$this->logger->error($exception);
}
}
}
When container started, this process is automatically started in background by command
php artisan mqtt:start > /dev/null &
Checking process is running by command ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
www 1 0.0 0.0 3832 3016 ? Ss 02:12 0:00 bash /usr/local/bin/cmd
www 64 0.1 1.0 126336 61000 ? S 02:12 0:02 php artisan mqtt:start
www 65 0.0 0.5 230460 35488 ? Ss 02:12 0:00 php-fpm: master process (/usr/local/etc/php-fpm.conf)
www 66 0.3 0.9 308336 57684 ? S 02:12 0:05 php-fpm: pool www
www 67 0.3 0.7 233172 46008 ? S 02:12 0:04 php-fpm: pool www
www 75 0.1 0.0 4096 3360 pts/0 Ss 02:34 0:00 bash
www 83 0.0 0.0 6696 2820 pts/0 R+ 02:35 0:00 ps aux
This command worked fine, but problem comes when MQTT client (my artisan command) receive messages continuously, process stop without any log, error or warning.
I've tried to publish messages with differences delay each time publish message:
With 0.01 second -> process stop after ~4k5 messages
With 0.1 second -> process stop after ~9k5 messages
My system:
WSL2 in window 11
WSL OS: Ubuntu 20.04
RAM: 6GB
CPU: 4
Can someone know where problem come from? Or how can I automatically restart my process when it stopped. Thanks

Answer 1

Incidentally, review my question and update some information for someone needed.
Thanks to #Namoshek, using supervisor solved the problem by auto restart command when it stopped.
Additionally, the supervisor log file for the process helped me debug my error. It's due to an exhausted memory error caused by Laravel Telescope. When I turn off Telescope, this error doesn't happen anymore. Besides, when I start the command when starting the docker container, I use the command php artisan mqtt:start > /dev/null &, which /dev/null removes all output errors. Thus, I could not track error thrown in the docker container log.