Error SQLSTATE[HY000]: General error

fork.php

<?php

$pdo = false;
function load_database() {
	global $pdo;
	try {
		$options = array();
		$options[PDO::ATTR_PERSISTENT] = true;
		$options[PDO::MYSQL_ATTR_USE_BUFFERED_QUERY] = true;
		$options[PDO::ATTR_EMULATE_PREPARES] = true;
		$options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
		$options[PDO::MYSQL_ATTR_INIT_COMMAND] = "SET NAMES utf8, CHARACTER_SET_DATABASE='utf8'";
		$pdo = new PDO('mysql:host=10.0.0.232;dbname=devel_timesat;charset=utf8', 'devel', '123456', $options);
	} catch (PDOException $e) {
		printf('erro load: ' . $e->getMessage());
	}
}

function db_get($query) {
	global $pdo;
	try {
		$resource = $pdo->prepare($query);
		$resource->execute();
		$data = $resource->fetchAll(PDO::FETCH_ASSOC);
		$resource->closeCursor();
		//sleep(1);
        return $data;

	} catch (PDOException $e) {
		printf('erro get: ' . $e->getMessage() . PHP_EOL);
	}
}

function db_insert_update($query) {
	global $pdo;
	try {
		$resource = $pdo->prepare($query);
		$resource->execute();
		$resource->closeCursor();
	} catch (PDOException $e) {
		printf('erro update: ' . $e->getMessage());
	}
}

function fork_me()
{
	//global $pdo;
	$pid = pcntl_fork();
	if ($pid == -1) {
		add_log('Erro durante o fork do processo de handle de uma nova conexão.', ERROR_LOG);
		die();
	} else if ($pid) {
		return;
	}
	while(true) {
		$query = 'SELECT * FROM transmissoes LIMIT ' . rand(1, 19824) . ', ' . rand(1, 300);
		$data = db_get($query);
		echo getmypid() . ' - ' . time() . PHP_EOL;
		sleep(3);
	}
}

load_database();
for($i = 0; $i < 3; $i++) {
	fork_me();
	sleep(1);
}
while(true) {}