分布式stream_socket_client(): unable to connect to tcp://172.31.18.200:4507 (Connection timed out) in

分布式之后会有这个异常错误 而且几台服务器都有 请问应该怎么排查 而且是开启一段时间后出现

PHP Warning:  stream_socket_client(): unable to connect to tcp://172.31.18.200:4507 (Connection timed out) in /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/Lib/Gateway.php on line 1151

Warning: stream_socket_client(): unable to connect to tcp://172.31.18.200:4507 (Connection timed out) in /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/Lib/Gateway.php on line 1151
Exception: can not connect to tcp://172.31.18.200:4507 Connection timed out in /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/Lib/Gateway.php:1153
Stack trace:
#0 /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/Lib/Gateway.php(1098): GatewayWorker\Lib\Gateway::sendAndRecv()
#1 /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/BusinessWorker.php(382): GatewayWorker\Lib\Gateway::getSession()
#2 /www/wwwroot/Route2/vendor/workerman/workerman/Connection/TcpConnection.php(638): GatewayWorker\BusinessWorker->onGatewayMessage()
#3 [internal function]: Workerman\Connection\TcpConnection->baseRead()
#4 /www/wwwroot/Route2/vendor/workerman/workerman/Events/Event.php(193): EventBase->loop()
#5 /www/wwwroot/Route2/vendor/workerman/workerman/Worker.php(2417): Workerman\Events\Event->loop()
#6 /www/wwwroot/Route2/vendor/workerman/gateway-worker/src/BusinessWorker.php(197): Workerman\Worker->run()
#7 /www/wwwroot/Route2/vendor/workerman/workerman/Worker.php(1541): GatewayWorker\BusinessWorker->run()
#8 /www/wwwroot/Route2/vendor/workerman/workerman/Worker.php(1383): Workerman\Worker::forkOneWorkerForLinux()
#9 /www/wwwroot/Route2/vendor/workerman/workerman/Worker.php(1357): Workerman\Worker::forkWorkersForLinux()
#10 /www/wwwroot/Route2/vendor/workerman/workerman/Worker.php(549): Workerman\Worker::forkWorkers()
#11 /www/wwwroot/Route2/start.php(37): Workerman\Worker::runAll()
#12 {main}