What are the consequences of reopening closed entityManager?

[f1amy]

Hello, I'm trying to deal with deadlocks and wait timeouts in a PHP consumer.

I Implemented retry functionality but getting The EntityManager is closed. exception on second try.
We're using old Symfony and most of our services and repositories use entityManager directly (without proxy).
So we can't use resetManager() method to replace closed entity manager with a new one everywhere at once.

I come up with the following solution which seems to be working for us.
But what are the "unforeseen" consequences of doing so?

    /**
     * @param EntityManager $entityManager
     * @return void
     */
    private function reopenEntityManager(EntityManager $entityManager): void
    {
        if ($entityManager->isOpen()) {
            throw new InvalidArgumentException('EntityManager is not closed to be reopened.');
        }

        $this->logger->notice('Reopening closed entityManager.');

        $reflection = new ReflectionObject($entityManager);
        $property = $reflection->getProperty('closed');
        $property->setAccessible(true);
        $property->setValue($entityManager, false);

        $entityManager->clear();
        $entityManager->getConnection()->close();
    }

[mpdude]

You should try to figure out (I don’t know) what it means that an EM has been closed, and what the reasons were to design the API in a way that it cannot easily be reopened.

Do yourself and future team mates a favor and try not to hack the EM as shown above.