bug描述

laravel框架使用gateway-client時，調用isUidOnline等諸多方法時，偶爾會出現卡頓5秒的情況。
經過排查源碼，發(fā)現是gatewayclient/Gateway.php這個文件的如下圖方法中，陷入死循環(huán)，到了超時時間5秒后退出循環(huán)。不知道是什么原因導致死循環(huán)

程序代碼或配置

//摘自源碼
 protected static function getBufferFromGateway($gateway_buffer_array)
    {
        $client_array = $status_data = $client_address_map = $receive_buffer_array = $recv_length_array = array();
        // 批量向所有gateway進程發(fā)送請求數據
        foreach ($gateway_buffer_array as $address => $gateway_buffer) {
            $client = stream_socket_client("tcp://$address", $errno, $errmsg, static::$connectTimeout);
            if ($client && strlen($gateway_buffer) === stream_socket_sendto($client, $gateway_buffer)) {
                $socket_id                        = (int)$client;
                $client_array[$socket_id]         = $client;
                $client_address_map[$socket_id]   = explode(':', $address);
                $receive_buffer_array[$socket_id] = '';
            }
        }
        // 超時5秒
        $timeout    = 5;
        $time_start = microtime(true);
        // 批量接收請求
        while (count($client_array) > 0) {
            $write = $except = array();
            $read  = $client_array;
            if (@stream_select($read, $write, $except, $timeout)) {
                foreach ($read as $client) {
                    $socket_id = (int)$client;
                    $buffer    = stream_socket_recvfrom($client, 65535);
                    if ($buffer !== '' && $buffer !== false) {
                        $receive_buffer_array[$socket_id] .= $buffer;
                        $receive_length = strlen($receive_buffer_array[$socket_id]);
                        if (empty($recv_length_array[$socket_id]) && $receive_length >= 4) {
                            $recv_length_array[$socket_id] = current(unpack('N', $receive_buffer_array[$socket_id]));
                        }
                        if (!empty($recv_length_array[$socket_id]) && $receive_length >= $recv_length_array[$socket_id] + 4) {
                            unset($client_array[$socket_id]);
                        }
                    } elseif (feof($client)) {
                        unset($client_array[$socket_id]);
                    }
                }
            }
            if (microtime(true) - $time_start > $timeout) {
                break;
            }
        }
        $format_buffer_array = array();
        foreach ($receive_buffer_array as $socket_id => $buffer) {
            $local_ip                                    = ip2long($client_address_map[$socket_id][0]);
            $local_port                                  = $client_address_map[$socket_id][1];
            $format_buffer_array[$local_ip][$local_port] = unserialize(substr($buffer, 4));
        }
        return $format_buffer_array;
    }

期待的結果及實際結果

希望各位大佬幫忙看看，是什么原因導致進入死循環(huán)，有什么優(yōu)化解決的方法。

重現bug的步驟

啟動web服務后，不確定的時間之后，無論調用調用isUidOnline還是getAllClientIdCount 等方法，都會走到那個死循環(huán)5秒后超時退出。于此同時，另一個項目卻可以正常的調用，調用的都是這同一個gateway-worker

系統(tǒng)環(huán)境及workerman/webman等具體版本

centos7
lumen5.8+laravelS加速
gatewayclient3.0.12
gatewayworker3.0.19