我有一个简单的 Azure V1 函数，可用作 CosmosDB 触发器，每次插入文档时，触发器都会工作并完成，Azure 控制台中函数应用程序本身的 App Insights 和监视器日志显示它触发了 1时间，代码的结果显示它触发了 1 次，但流控制台显示重复的输出，这是设计使然还是我做错了什么？
这就是函数
using System.Collections.Generic;
using Microsoft.Azure.Documents;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Newtonsoft.Json.Linq;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System;
using System.Threading.Tasks;
namespace NWCloudTransactionEventHandler
{
public static class Function1
{
[FunctionName("Function1")]
public static async Task RunAsync([CosmosDBTrigger(
databaseName: "xxx",
collectionName: "xxx",
ConnectionStringSetting = "xxx",
LeaseCollectionName = "leases", LeaseCollectionPrefix = "cloud")]IReadOnlyList<Document> documents, TraceWriter log)
{
if (documents != null && documents.Count > 0)
{
log.Info("Start change feed processing");
log.Info("Documents modified " + documents.Count);
foreach(var document in documents)
{
dynamic jsonDoc = document;
string destinationSystem = jsonDoc.OriginalTransaction["destinationSystem"];
log.Info("destination system = " + destinationSystem);
if(destinationSystem == "xx.com")
{
log.Info("Start processing destinaton = xx.com");
string destinationSystemCountry = jsonDoc.OriginalTransaction["destinationSystemCountry"];
log.Info("destination country = " + destinationSystemCountry);
if (destinationSystemCountry == "xx")
{
log.Info("Start processing xx.com destination Country = xx");
JObject transaction = jsonDoc.OriginalTransaction["transactionDetails"];
log.Info("transactionDetail = " + transaction);
log.Info("Starting httpRequest");
HttpClient httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Add("Authorization", "xxxx");
HttpResponseMessage response = await httpClient.PostAsync("https://xxx/checkout", new StringContent(transaction.ToString(), System.Text.Encoding.UTF8, "application/json"));
log.Info("response is " + response);
}
else
{
log.Info("Destinationcountry is unsupported at this time");
return;
}
}
else
{
log.Info("Destinationsystem is unsupported at this time");
return;
}
}
log.Info("Change feed processing finished");
}
}
}
}
下面您可以看到重复的输出
2018-09-29T03:35:03 Welcome, you are now connected to log-streaming service.
2018-09-29T03:35:02.639 [Info] Executing HTTP request: {
"requestId": "1ebc2482-cb42-4b78-aa8f-c74e8d47a0e5",
"method": "GET",
"uri": "/admin/host/status"
}
2018-09-29T03:35:02.654 [Info] Host Status: {
"id": "nwcloudtransactioneventhandler-t",
"state": "Running",
"version": "1.0.11959.0"
}
2018-09-29T03:35:02.654 [Info] Executed HTTP request: {
"requestId": "1ebc2482-cb42-4b78-aa8f-c74e8d47a0e5",
"method": "GET",
"uri": "/admin/host/status",
"authorizationLevel": "Admin",
"status": "OK"
}
2018-09-29T03:35:20.638 [Info] Function started (Id=820dff13-dfb3-4641-84d9-123c85aa9ac2)
2018-09-29T03:35:20.638 [Info] Start change feed processing
2018-09-29T03:35:20.638 [Info] Documents modified 1
2018-09-29T03:35:20.638 [Info] destination system = xx.com
2018-09-29T03:35:20.638 [Info] Start processing destinaton = xx.com
2018-09-29T03:35:20.638 [Info] destination country = xx2018-09-29T03:35:20.638 [Info] Start processing hm.com destination Country = xx2018-09-29T03:35:20.638 [Info] transactionDetail = {
"callback": {
"refund": "https://x",
"success": "https://x"
},
"items": [
{
"attributes": {
"color": "Orange/Guld",
"size": "NOSIZE"
},
"price": "xx",
"quantity": "1",
"shipping": "0.0",
"title": "Bordslampa-Orange/Guld-NOSIZE",
"url": "xx"
}
],
"paymentMethod": {
"code": "XYZ",
"phone": "x",
"type": "x"
},
"reference": "x",
"test": "true"
}
2018-09-29T03:35:20.638 [Info] Starting httpRequest
2018-09-29T03:35:20.684 [Info] response is StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Vary: Origin
X-Content-Type-Options: nosniff
X-Frame-Options: ALLOWALL
X-Request-Id: c44a4e1a-55f0-4c0b-8183-3433530b7920
X-Runtime: 0.010130
X-Xss-Protection: 1; mode=block
Connection: keep-alive
Cache-Control: must-revalidate, max-age=0, private
Date: Sat, 29 Sep 2018 03:35:20 GMT
ETag: "52a9130e2fdb487944cfa9498bc071d0"
Content-Length: 1031
Content-Type: application/json; charset=utf-8
}
2018-09-29T03:35:20.684 [Info] Change feed processing finished
2018-09-29T03:35:20.684 [Info] Function completed (Success, Id=820dff13-dfb3-4641-84d9-123c85aa9ac2, Duration=46ms)
2018-09-29T03:35:20.638 [Info,Function1] Function started (Id=820dff13-dfb3-4641-84d9-123c85aa9ac2)
2018-09-29T03:35:20.638 [Info,Function1] Executing 'Function1' (Reason='New changes on collection transactions at 2018-09-29T03:35:20.6380214Z', Id=820dff13-dfb3-4641-84d9-123c85aa9ac2)
2018-09-29T03:35:20.638 [Info,Function1] Start change feed processing
2018-09-29T03:35:20.638 [Info,Function1] Documents modified 1
2018-09-29T03:35:20.638 [Info,Function1] destination system = xx.com
2018-09-29T03:35:20.638 [Info,Function1] Start processing destinaton = xx.com
2018-09-29T03:35:20.638 [Info,Function1] destination country = xx2018-09-29T03:35:20.638 [Info,Function1] Start processing xx.com destination Country = xx2018-09-29T03:35:20.638 [Info,Function1] transactionDetail = {
"callback": {
"refund": "https://x",
"success": "https://nxs"
},
"items": [
{
"attributes": {
"color": "Orange/Guld",
"size": "NOSIZE"
},
"price": "x",
"quantity": "1",
"shipping": "0.0",
"title": "Bordslampa-Orange/Guld-NOSIZE",
"url": "x"
}
],
"paymentMethod": {
"code": "XYZ",
"phone": "x",
"type": "x"
},
"reference": "x",
"test": "true"
}
2018-09-29T03:35:20.638 [Info,Function1] Starting httpRequest
2018-09-29T03:35:20.684 [Info,Function1] response is StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Vary: Origin
X-Content-Type-Options: nosniff
X-Frame-Options: ALLOWALL
X-Request-Id: c44a4e1a-55f0-4c0b-8183-3433530b7920
X-Runtime: 0.010130
X-Xss-Protection: 1; mode=block
Connection: keep-alive
Cache-Control: must-revalidate, max-age=0, private
Date: Sat, 29 Sep 2018 03:35:20 GMT
ETag: "52a9130e2fdb487944cfa9498bc071d0"
Content-Length: 1031
Content-Type: application/json; charset=utf-8
}
2018-09-29T03:35:20.684 [Info,Function1] Change feed processing finished
2018-09-29T03:35:20.684 [Info,Function1] Function completed (Success, Id=820dff13-dfb3-4641-84d9-123c85aa9ac2, Duration=46ms)
2018-09-29T03:35:20.684 [Info,Function1] Executed 'Function1' (Succeeded, Id=820dff13-dfb3-4641-84d9-123c85aa9ac2)
最佳答案
这是一个 bug已跟踪但尚未修复。
当功能代码面板打开时，文件日志(即诊断日志中的应用程序日志)被启用。与函数相关的条目会写入主机日志和函数日志，即写入 (kudu https://funcappname.scm.azurewebsites.net/DebugConsole) 中的文件:
- D:\home\LogFiles\Application\Functions\Host\
- D:\home\LogFiles\Application\Functions\Function\函数名称\
日志流控制台会打印主机日志和功能日志，因此与功能相关的条目会出现两次。例如，带有 [Info,Function1] 前缀的日志是主机日志中与函数相关的条目，这对我们来说是重复的。
关于c# - 为什么 azure Function App 流式日志查看器会重复日志输出？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52565026/