rpc错误:代码=不可用desc = Go代码中的连接已关闭 [英] rpc error: code = Unavailable desc = connection closed in Go code

问题描述

我正在进行 Dgraph 和 Go 集成.我正在尝试访问 Go 中的 Dgraph 查询，为此，我正在使用 github.com/dgraph-io/dgo 库.

I am working on Dgraph and Go integration.I am trying to access Dgraph query in Go and for that I am using github.com/dgraph-io/dgo library.

这是代码:

package main

import (
    "bytes"
    "context"
    "fmt"
    "io/ioutil"
    "log"

    "github.com/dgraph-io/dgo"
    "github.com/dgraph-io/dgo/protos/api"

    "google.golang.org/grpc"
)

func main() {

     query := `{
         people(func: has(name)) {
            name
           follows{
             name
           }
         }
     }`

     conn, err := grpc.Dial("x.x.x.x:8000", grpc.WithInsecure())
     if err != nil {
          log.Fatal(err)
     }
     ctx := context.Background()
     dgraphClient := dgo.NewDgraphClient(api.NewDgraphClient(conn))

     txn := dgraphClient.NewTxn()
     txn.Query(ctx, query)

     request := &api.Request{
          Query: query,
     }

     response, err := txn.Do(ctx, request)
     if err != nil {
          log.Fatal(err)
     }
     fmt.Println(string(response.Json))
}

我遇到错误 rpc错误:尝试运行代码时，代码=不可用desc =连接已关闭.由于我是 Go 和 DGraph数据库的新手，所以我的知识非常有限.

I am getting error rpc error: code = Unavailable desc = connection closed when I an trying to run code. As I am new to the Go and DGraph Database I have very limited knowledge.

任何人都可以帮忙，需要进行哪些确切的更改以解决此错误.

Can anyone please help what exact changes need to be done to fix this error.

推荐答案

端口8000上的服务仅是UI.如果要使用gRPC，则必须在端口9080中调用它.绝不要8080、8000、6080等.检查此文档 https://dgraph.io/docs/deploy/ports-usage/#types-of-ports

The service at the port 8000 is the UI only. If you wanna use gRPC you have to call it in the port 9080. Never 8080, 8000, 6080, and so on. Check this docs https://dgraph.io/docs/deploy/ports-usage/#types-of-ports

在此示例中 https://github.com/dgraph-io/dgo/blob/a38d5eaacbf8667cc2d6e7b40bd0978cede4000f/examples_test.go#L35

它正在使用端口9180.因为测试群集的偏移量为100.这意味着Alpha中的所有端口都增加了100个整数.因此，Alpha中的所有端口都必须考虑偏移量.其余的API是8180，而gRPC是9180.

It is using the port 9180. Cuz the Cluster for testing has an offset of 100. That means that all ports in the Alpha increases 100 ints. So, all ports in Alpha have to take into account the offset. The rest API is 8180 and the gRPC is 9180.

在通常情况下，您在学习事物时就不会考虑使用偏移量.因此，您可能启动了一个普通集群.默认端口为9080.

In the usual cases, you would never think about using offset when you are learning things. So you probably started a normal cluster. And the default port is 9080.

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