private function processJob()
{
while (count($this->forkMap) < $this->size && !empty($this->jobQueue)) {
$jobId = array_pop($this->jobQueue);
$data = $this->jobMap[$jobId];
$this->jobForkMap[$jobId] = $fork = new Fork($this->runnable);
$fork->start();
$this->logger->trace("save fork in forkMap[{$fork->getPid()}]");
$this->forkMap[$fork->getPid()] = $fork;
$fork->send($data);
}
}
