用example里的simple producer连不上RocketMQ，什么原因？

用example里的simple producer连不上RocketMQ，什么原因？但是用rocketmq-clients/golang/v5是可以正常收发消息的，我的RocketMQ 是5.2.0版本的，是版本问题吗？
time="2024-07-04T18:53:28+08:00" level=info msg="change the route for clients"
time="2024-07-04T18:53:28+08:00" level=info msg="the topic route info changed" changeTo="{\"OrderTopicConf\":\"\",\"queueDatas\":[{\"brokerName\":\"broker-a\",\"readQueueNums\":16,\"writeQueueNums\":16,\"perm\":6,\"topicSynFlag\":0}],\"brokerDatas\":[{\"cluster\":\"DefaultCluster\",\"brokerName\":\"broker-a\",\"brokerAddrs\":{\"0\":\"192.168.80.4:10911\"}}]}" changedFrom="" topic=TestTopic
time="2024-07-04T18:53:32+08:00" level=warning msg="send heart beat to broker error" underlayError="request timeout"
time="2024-07-04T18:53:33+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62266->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:53:39+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62268->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
time="2024-07-04T18:53:45+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62274->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:53:51+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62285->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:53:57+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62287->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
time="2024-07-04T18:54:03+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62293->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:54:05+08:00" level=warning msg="send heart beat to broker error" underlayError="request timeout"
time="2024-07-04T18:54:09+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62297->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:54:15+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62305->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
time="2024-07-04T18:54:21+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62308->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout
time="2024-07-04T18:54:27+08:00" level=error msg="conn error, close connection" underlayError="read tcp 198.18.0.1:62314->192.168.80.4:10911: wsarecv: An existing connection was forcibly closed by the remote host."
send message error: request timeout