Serilog：使用简单的 for 循环记录时缺少日志

Question

我已经开始使用 Serilog 并编写了测试 Dot Net Core 3.1 控制台应用程序。

在我的简单项目中，我正在循环和记录。 Serilog 登录 Console 和 File.

但我发现在 10,000 个日志条目后日志会丢失。直到 10,000 个日志条目，所有日志在控制台和文件中都是序列，但在 10,000 个条目之后，Console 和 File 上的日志开始丢失。比如10000后29483.

此外，用于刷新所有日志的函数调用 Log.CloseAndFlush() 无法正常工作，因为我在 Console[=47] 的末尾没有看到日志条目 "FINISHED" =]和文件.

2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:1
........ Logs are in sequencial order ........
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9993
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9994
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9995
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9996
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9997
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9998
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:9999
2020-05-26 12:12:38.575 | [INFO] | Thread-1 | hello:10000
2020-05-26 12:12:38.637 | [INFO] | Thread-1 | hello:29483
2020-05-26 12:12:38.689 | [INFO] | Thread-1 | hello:62627
2020-05-26 12:12:38.693 | [INFO] | Thread-1 | hello:64740
2020-05-26 12:12:38.694 | [INFO] | Thread-1 | hello:65624
2020-05-26 12:12:38.695 | [INFO] | Thread-1 | hello:66169
2020-05-26 12:12:38.697 | [INFO] | Thread-1 | hello:66662
2020-05-26 12:12:38.697 | [INFO] | Thread-1 | hello:67040
2020-05-26 12:12:38.698 | [INFO] | Thread-1 | hello:67432
2020-05-26 12:12:38.698 | [INFO] | Thread-1 | hello:67828
2020-05-26 12:12:38.699 | [INFO] | Thread-1 | hello:68083
2020-05-26 12:12:38.700 | [INFO] | Thread-1 | hello:68386
2020-05-26 12:12:38.700 | [INFO] | Thread-1 | hello:68756
2020-05-26 12:12:38.701 | [INFO] | Thread-1 | hello:69387
2020-05-26 12:12:38.702 | [INFO] | Thread-1 | hello:69904
2020-05-26 12:12:38.703 | [INFO] | Thread-1 | hello:70296
2020-05-26 12:12:38.703 | [INFO] | Thread-1 | hello:70681
2020-05-26 12:12:38.704 | [INFO] | Thread-1 | hello:71093
2020-05-26 12:12:38.706 | [INFO] | Thread-1 | hello:72488
2020-05-26 12:12:38.706 | [INFO] | Thread-1 | hello:72945
2020-05-26 12:12:38.707 | [INFO] | Thread-1 | hello:73590
2020-05-26 12:12:38.708 | [INFO] | Thread-1 | hello:73975
2020-05-26 12:12:38.708 | [INFO] | Thread-1 | hello:74383
2020-05-26 12:12:38.709 | [INFO] | Thread-1 | hello:74783
2020-05-26 12:12:38.709 | [INFO] | Thread-1 | hello:75183
2020-05-26 12:12:38.711 | [INFO] | Thread-1 | hello:75644
2020-05-26 12:12:38.712 | [INFO] | Thread-1 | hello:76087
2020-05-26 12:12:38.713 | [INFO] | Thread-1 | hello:76719

我正在查看其他开发人员因丢失日志而面临的问题，但其中 none 与我的问题有关。

Program.cs

using Microsoft.Extensions.Configuration;
using Serilog;
using Serilog.Core;
using System;

namespace MyApp
{
    public class Program
    {
        static void Main(string[] args)
        {
            var l_config = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();

            Logger l_log = new LoggerConfiguration().ReadFrom.Configuration(l_config).CreateLogger();
            Log.Logger = l_log;

            for (long l_index = 0; l_index < 100000L; l_index++)
            {
                Log.Information("hello:" + l_index);
            }
            Log.Information("FINISHED");
            Log.CloseAndFlush();
            Console.ReadKey();
        }

        ~Program()
        {
            Log.CloseAndFlush();
        }
    }
}

appsettings.json

{
    "Serilog": {
        "Using": ["Serilog.Sinks.Console"],
        "MinimumLevel": "Debug",
        "WriteTo": [{
                "Name": "Async",
                "Args": {
                    "configure": [{
                            "Name": "Console",
                            "Args": {
                                "MinimumLevel": "Verbose",
                                "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} | [{Level:u4}] | Thread-{ThreadId} | {Message:lj}{NewLine}{Exception}"
                            }                           
                        }, {
                            "Name": "File",
                            "Args": {
                                "MinimumLevel": "Verbose",
                                "path": "Logs\log..txt",                               
                                "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} | [{Level:u4}] | Thread-{ThreadId} | {Message:lj}{NewLine}{Exception}",
                                "rollingInterval": "Hour",
                            }
                        }
                    ]
                }
            }
        ],
        "Enrich": ["FromLogContext", "WithThreadId"],
        "Destructure": [{
                "Name": "ToMaximumDepth",
                "Args": {
                    "maximumDestructuringDepth": 4
                }
            }, {
                "Name": "ToMaximumStringLength",
                "Args": {
                    "maximumStringLength": 100
                }
            }, {
                "Name": "ToMaximumCollectionCount",
                "Args": {
                    "maximumCollectionCount": 10
                }
            }
        ],
        "Properties": {
            "Application": "MyApp"
        }
    }
}

使用 Nuget 包：

• Serilog.dll
• Serilog.Enrichers.Environment.dll
• Serilog.Enrichers.Thread.dll
• Serilog.Settings.Configuration.dll
• Serilog.Sinks.Async.dll
• Serilog.Sinks.Console.dll

很抱歉在这里提供了很多信息，但这是必需的，这样我们才能查明问题所在。

Answer 1

这是因为缓冲区大小 feeding Async() 默认固定为 10,000 项，满时不会阻塞。

要更改此设置，请添加 blockWhenFull: true:

    "WriteTo": [{
            "Name": "Async",
            "Args": {
                "blockWhenFull": true,
                "configure": [{

更多信息here and here。