问题描述
当我使用 shell 时,它返回正常,
但是当我使用 golang 时它返回 err: context deadline exceeded
。
为什么?
package main
import (
"context"
"fmt"
"go.etcd.io/etcd/clientv3"
"time"
)
func main() {
cli,err := clientv3.New(clientv3.Config{
Endpoints: []string{"http://192.168.11.34:2379"},DialTimeout: 5*time.Second,})
if err != nil{
panic(err)
}
fmt.Println("connect etcd success!")
defer cli.Close()
ctx,cancel := context.WithTimeout(context.Background(),time.Second*5)
_,err = cli.Put(ctx,"mac","leave")
defer cancel()
if err !=nil{
fmt.Println("put etcd err:",err.Error())
return
}
}
connect etcd success!
{"level":"warn","ts":"2021-02-08T17:10:46.490+0800","caller":"clientv3/retry_interceptor.go:62","msg":"retrying of unary invoker Failed","target":"endpoint://client-5b14f6c4-2395-4a15-9ebb-cadf5985fb06/192.168.11.34:2379","attempt":0,"error":"rpc error: code = DeadlineExceeded desc = latest balancer error: all SubConns are in TransientFailure,latest connection error: connection error: desc = \"transport: Error while dialing dial tcp 192.168.11.34:2379: connect: connection refused\""}
put etcd err: context deadline exceeded
解决方法
创建客户端并不能保证建立连接。 它可能会延迟到第一个实际失败的请求。
请确保您的服务器可以访问。
,增加您的超时时间:
DialTimeout: 5*time.Second
如果您收到 context deadline exceeded
错误,显然已超出此时间。