伺服器redis
在不同的網路命名空間中運作。我正在嘗試將客戶端連接到redis
伺服器,它一直在等待但沒有回應,已經幾個小時了。
客戶端程式碼:
int main(){
// ***** Pipeline *****
auto redis = Redis("tcp://192.168.122.50:6379");
// Create a pipeline.
// auto pipe = redis.pipeline(false);
sleep(5);
int ep = 1;
while(true){
cout<<"========================"<<ep++<<"==================================================\n";
auto pipe = redis.pipeline(false);
for(int i=1; i<=1000; i++){
string s = to_string(i);
if(i%2 == 1){
pipe.set(s, s);
}
else {
string st = to_string(i-1);
pipe.get(st);
}
}
auto pipe_replies = pipe.exec();
time += duration;
mntime = min(duration, mntime);
mxtime = max(duration, mxtime);
cout<<"RESULTS\n";
for (int i=1; i<=1000; i++) {
if (i%2 == 1) {
auto set_result = pipe_replies.get<bool>(i-1);
cout<<set_result<<"\n";
} else {
OptionalString get_result = pipe_replies.get<OptionalString>(i-1);
if (get_result)
cout << *get_result << endl;
else
cout << "key does not exist" << endl;
}
}
//cout<<"============================================================================\n";
pipe.discard();
}
終端輸出:
secondaryvm@secondaryvm:~/tests$ ./hclient
========================1==================================================
已經一個小時了,還在等待,所以我用 分析了它tcpdump
。這是 的 tcp 流輸出tcpdump
。我還嘗試 ping redis 伺服器運行的連接埠並且該連接埠已開啟。
root@secondaryvm:/home/secondaryvm/tests# nmap -p 6379 192.168.122.50
Starting Nmap 7.60 ( https://nmap.org ) at 2020-12-30 16:26 IST
Nmap scan report for 192.168.122.50
Host is up (0.000050s latency).
PORT STATE SERVICE
6379/tcp open redis
MAC Address: FE:2D:4A:25:55:EE (Unknown)
這裡發生了什麼事?以及如何預防?