在項(xiàng)目運(yùn)行中遇到不定時(shí)出現(xiàn)這個(gè)問(wèn)題，目前已解決，問(wèn)題如下：
?Gateway.php:372

 if ($this->_workerConnections) {
    // 調(diào)用路由函數(shù)，選擇一個(gè)worker把請(qǐng)求轉(zhuǎn)發(fā)給它
    /** @var TcpConnection $worker_connection */
    $worker_connection = call_user_func($this->router, $this->_workerConnections, $connection, $cmd, $body);
    if (false === $worker_connection->send($gateway_data)) {
        $msg = "SendBufferToWorker fail. May be the send buffer are overflow. See http://wiki.workerman.net/Error2";
        static::log($msg);
        return false;
    }
} 

// 沒(méi)有可用的 worker此時(shí)判斷了$this->_workerConnections是否為真，如果為真就去調(diào)用了路由函數(shù)
?
如果此時(shí)reload，用戶(hù)有多個(gè)worker進(jìn)程，并且自定義了路由，需要把用戶(hù)路由到特定worker進(jìn)程
?
那么此時(shí)在$this->_workerConnections中很有可能不是全部已啟動(dòng)好的worker

其中可能因?yàn)樾枰獁orker進(jìn)程未加載完成，所以并不包含需要的worker進(jìn)程?

這時(shí)就有可能會(huì)出現(xiàn)一個(gè)致命錯(cuò)誤：null調(diào)用了不存在的方法send()
?
因此需要修改一下這個(gè)判斷是否有可用worker的if判斷:

if ($this->_workerConnections) {
    // 調(diào)用路由函數(shù)，選擇一個(gè)worker把請(qǐng)求轉(zhuǎn)發(fā)給它
    /** @var TcpConnection $worker_connection */
    $worker_connection = call_user_func($this->router, $this->_workerConnections, $connection, $cmd, $body);
    if (!$worker_connection) {
        do {
            $worker_connection = call_user_func($this->router, $this->_workerConnections, $connection, $cmd, $body);
        } while(!$worker_connection);
    }
    if (false === $worker_connection->send($gateway_data)) {
        $msg = "SendBufferToWorker fail. May be the send buffer are overflow. See http://wiki.workerman.net/Error2";
        static::log($msg);
        return false;
    }
} 

// 沒(méi)有可用的 worker麻煩walkor看看，希望在框架中修復(fù)，這樣我們就不用侵入去修改框架的代碼，造成后續(xù)git更新框架的困擾