Propel ORM: PDOException " Can't create more than max_prepared_stmt_count statements"

[admin]

I have large MySQL database. I want to fetch rows by 100 at once until all DB is processed.

protected function doEcho($msg){
    static $time, $start;
    if (!$start) $start = time();

    if (time() - $time > 0) {
        echo $msg . "\n\n";
        $time = time();
    }
}

// ZF2 action
public function stuffAction() {
    $request = $this->getRequest();
    if (!$request instanceof ConsoleRequest){
        throw new \RuntimeException('You can only use this action from a console!');
    }

    // Propel ORM generated Model UserQuery
    $q = \UserQuery::create()->limit(100)->filterByProcessed(0);
    $users = $q->find();        

    while ($users->count() ) {
        foreach ($users as $user) {
            $id = $user->getId();
            $email = $user->getEmail();
            $password = $user->getPassword();
            $this->doEcho("$id - $email - $password");
            // do stuff and set processed to 1
        }

        $q = \UserQuery::create()->limit(100)->filterByProcessed(0);
        $users = $q->find();
    }
}

I get the following exception raised:

======================================================================

<h1> The application has thrown an exception!</h1>

Propel\Runtime\Exception\PropelException

<h2> Unable to execute SELECT statement [SELECT user.ID, user.EMAIL, user.PASSWORD, user.PHONE, user.IP, user.PROCESSED, user.WHEN FROM

user

WHERE user.PROCESSED=1 LIMIT 100]</h2>

// debug backtrace

======================================================================

<h1> Previous Exception(s):</h1>

PDOException

<h2> SQLSTATE[42000]: Syntax error or access violation: 1461 Can't create more than max_prepared_stmt_count statements (current value: 16382)</h2>

// debug backtrace

<strong>Obviously, the reason is that:</strong>

<blockquote>
<a href="http://iammysql.wordpress.com/2012/05/04/cant-create-more-than-max_prepared_stmt_count-statements/" rel="nofollow">An application con</a>necting to the database was preparing sql
statements, executing them, then not closing them.
</blockquote>

How do I make Propel to close statements ? I do use Propel 2: "propel/propel": "2.0.*@dev"