Uncaught Error: Call to a member function getPid() on null

[ziggurad]

Hello,

In my Sentry I found such an error: Uncaught Error: Call to a member function getPid() on null
from:
Elements\Bundle\ProcessManagerBundle\Model\MonitoringItem::isAlive
code:

    public function isAlive(): bool
    {
        if ($this->isMessengerPending()) {
            return true;
        }
        if ($this->getPid()) {
            $messageBus = \Pimcore::getContainer()->get('messenger.bus.pimcore-core');
            $message = new CheckCommandAliveMessage($this->getId());
            $messageBus->dispatch($message);

            return (bool)self::getById($this->getId())->getPid();
        } else {
            return false;
        }
    }

[say-my-name-user]

Hi all,

in my case the root cause was in several bin/console process-manager:maintenance processes run simultaneously.

In that case one process can change/remove the monitoring item in the way that another could not handle it and crached the entire process.