protected function setup()
{
$this->server = new BuiltInServer('configLoader');
$this->server_addr = $this->server->start();
$this->server_pid = $this->server->getPid();
$this->shared_file = sys_get_temp_dir() . '/' . $this->server_pid . '.lock';
@unlink($this->shared_file);
// remove it if it exists
}