Single-file and self-deployed application encounters "random" System.IO.FileNotFoundException exceptions when loading libraries

Hi,

I have a recurrent and seemingly quite random runtime issue on local servers of my customers (>= Windows 10 || >= Windows Server 16) while running an ASP.NET Core server application (Kestrel) : they sometime encounter a "FileNotFound" exception on some of the libraries required by the application code.
Some general context information:

• the executable is a server operating mainly on the local network of my customers
• it is published as single-file and self-deployed (see project .csproj further)

I recently developped a workaround that consists in detecting some of these "FileNotFound" exceptions as a trigger to reboot the application, which temporarily solves the problem… unless the "System.Diagnostics.Process" library is not found itself while I try to use it to stop my running instance after launching a new one (Process.Start // Process.GetCurrentProcess().Kill()).

I ran into some quite similar reports, but they differ from my case on an essential point : they do not happen randomly at runtime.
See :

•  .NET Core 3.1 Self-contained fails with System.IO.FileNotFoundException: Could not load file or assembly 'mscorlib, Version=4.0.0.0 #34494
• Website cannot load Microsoft.EntityFrameworkCore efcore#27029

Technical description

Several major libraries could not get loaded at runtime, including the one required for the self-rebooting utility :

• System.Diagnostics.Process (log timestamp :  2022-01-20 04:33:55.9801)
• Grpc.Core (timestamp: 2022-01-20 04:12:17.3012)
• EntityFrameworkCore (timestamp: 2022-01-20 04:33:55.9641)

Target framework : netcoreapp3.1

Please remind that manually relaunching the application solves the issue (but as it is deployed at our many customers, this is not a quite suitable solution to us).

Log trace

Fichier log configuré.2022-01-20 03:57:13.6797|INFO|iZiServer|Logger instantiated. 
2022-01-20 03:57:13.7033|INFO|iZiServer|iZiServer (version : "1.1.0.11") launches "Program" 
2022-01-20 03:57:13.8460|INFO|iZiServer|Launching broadcasting service. 
2022-01-20 03:57:13.8460|INFO|iZiServer|Broadcast message : iZiServer@50050,50052 
2022-01-20 03:57:13.8460|INFO|iZiServer|iZiServer now ready to broadcast its address on UDP socket, port 8888 
2022-01-20 03:57:13.8460|INFO|iZiServer|MonitorTracabilitePictures() launches tracabilite files verification. 
2022-01-20 03:57:13.8460|INFO|iZiServer|Checking for new tracabilite files info. 
2022-01-20 03:57:17.2692|INFO|iZiServer|MonitorTracabilitePictures() exported new info. 
2022-01-20 03:57:17.2692|INFO|iZiServer|Launching iZiServer gRPC activity monitoring service. 
2022-01-20 04:12:17.3012|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad'
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at iZiServer.AutoMonitor.GrpcMonitorService.VerifyGrpcChannel(CancellationToken stoppingToken)
   at iZiServer.AutoMonitor.GrpcMonitorService.ExecuteAsync(CancellationToken stoppingToken)

 System.IO.FileNotFoundException: 
File name: 'Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad'
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at iZiServer.AutoMonitor.GrpcMonitorService.VerifyGrpcChannel(CancellationToken stoppingToken)
   at iZiServer.AutoMonitor.GrpcMonitorService.ExecuteAsync(CancellationToken stoppingToken)


2022-01-20 04:27:17.2692|INFO|iZiServer|MonitorTracabilitePictures() launches tracabilite files verification. 
2022-01-20 04:27:17.2692|INFO|iZiServer|Checking for new tracabilite files info. 
2022-01-20 04:27:17.2692|INFO|iZiServer|MonitorTracabilitePictures() exported nothing. 
2022-01-20 04:33:25.9219|INFO|iZiServer|Client discovered : 192.168.1.12 
2022-01-20 04:33:35.9536|INFO|iZiServer|Client discovered : 192.168.1.12 
2022-01-20 04:33:45.9354|INFO|iZiServer|Vérification annulée: un ping UDP plus récent a été reçu. 
2022-01-20 04:33:45.9354|INFO|iZiServer|Dernier ping UDP : 20/01/22 04:33:35.9544 
2022-01-20 04:33:55.9641|INFO|iZiServer|Dernier ping UDP : 20/01/22 04:33:35.9544 
2022-01-20 04:33:55.9641|INFO|iZiServer|Dernier appel gRPC : 01/01/70 00:00:00.0000 
2022-01-20 04:33:55.9641|INFO|iZiServer|Redémarrage automatique d’iZiServer (indisponibilité du socket gRPC détectée). 
2022-01-20 04:33:55.9641|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'Microsoft.EntityFrameworkCore, Version=5.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'
   at iZiServer.Persistence.Database.MonitoringsRepository.AddEvent(String eventName, DateTime timestamp)
   at iZiServer.Persistence.Logger.Monitor(String eventName, DateTime timestamp)

 System.IO.FileNotFoundException: 
File name: 'Microsoft.EntityFrameworkCore, Version=5.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'
   at iZiServer.Persistence.Database.MonitoringsRepository.AddEvent(String eventName, DateTime timestamp)
   at iZiServer.Persistence.Logger.Monitor(String eventName, DateTime timestamp)


2022-01-20 04:33:55.9641|WARN|iZiServer|Monitoring iZiServer : échec de l’enregistrement d’un évènement dans la table de monitoring. 
2022-01-20 04:33:55.9801|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'System.Diagnostics.Process, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at iZiServer.AutoMonitor.GrpcMonitorService.RebootiZiServer()
   at iZiServer.AutoMonitor.LastCallsRegistry.DelayedGrpcCallChecking(ILogger logger)
   at iZiServer.Core.TaskUtilities.FireAndForgetSafeAsync(Task task, IErrorHandler handler)

 System.IO.FileNotFoundException: 
File name: 'System.Diagnostics.Process, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at iZiServer.AutoMonitor.GrpcMonitorService.RebootiZiServer()
   at iZiServer.AutoMonitor.LastCallsRegistry.DelayedGrpcCallChecking(ILogger logger)
   at iZiServer.Core.TaskUtilities.FireAndForgetSafeAsync(Task task, IErrorHandler handler)


2022-01-20 04:56:41.8556|INFO|iZiServer|Client discovered : 192.168.1.10 
2022-01-20 04:56:51.8600|INFO|iZiServer|Client discovered : 192.168.1.10 
2022-01-20 04:57:01.8646|INFO|iZiServer|Vérification annulée: une procédure de redémarrage vient d’être lancée. 
2022-01-20 04:57:11.8640|INFO|iZiServer|Vérification annulée: une procédure de redémarrage vient d’être lancée. 

Code excerpts

Reboot utility (for System.Diagnostics.Process)

using iZiServer.AutoMonitor.GrpcMonitorClient;
using iZiServer.Core;
using iZiServer.Persistence;
using iZiServer.Persistence.Configuration;
using Microsoft.Extensions.Hosting;
using System;
using System.Diagnostics;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

namespace iZiServer.AutoMonitor
{
    public class GrpcMonitorService : BackgroundService
    {
        private ILogger logger;
        private static bool onGoingReboot = false;

        internal static void RebootiZiServer()
        {
            var logger = new Logger();
            logger.Info("Auto-reboot of iZiServer…");
            if (onGoingReboot)
            {
                logger.Info("Annulation auto-reboot : un redémarrage est déjà en cours.");
                return;
            }
            var progPath = ConfigurationAccessor.RetrieveConfiguration().ExecutableBinariesFolder;
            if (!string.IsNullOrWhiteSpace(progPath))
            {
                var iziserverPath = Path.Combine(progPath, "iZiServer.exe");
                logger?.Info("Starting new iZiServer instance…");
                Process.Start(iziserverPath);
                onGoingReboot = true;
                logger?.Info("Shutting down old iZiServer instance…");
                Process.GetCurrentProcess().Kill();
            }
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            try
            {
                logger = new Logger();
                logger?.Info("Launching iZiServer gRPC activity monitoring service.");
                var interval = TimeSpan.FromMinutes(15);
                while (!stoppingToken.IsCancellationRequested)
                {
                    await Task.Delay(interval, stoppingToken);
                    await VerifyGrpcChannel(stoppingToken);
                }
            }
            catch (OperationCanceledException ex)
            {
                logger?.Info(ex.Message);
            }
            catch (Exception ex)
            {
                logger?.Error(ex);
                throw;
            }
        }

        private async Task VerifyGrpcChannel(CancellationToken stoppingToken)
        {
            var isChannelUp = await GrpcClientTool.IsGrpcChannelUp(logger);
            logger?.Info($"iZiServer gPRC channels availability : {(isChannelUp ? "OK" : "KO")}");
            if (!stoppingToken.IsCancellationRequested && !isChannelUp)
            {
                RebootiZiServer();
            }
        }
    }
}

Log utility (for EntityFrameworkCore)

using iZiServer.Core;
using iZiServer.Core.Monitoring;
using iZiServer.Persistence.Database;
using System;

namespace iZiServer.Persistence
{
    public class Logger : NugetLogger.Logger, ILogger
    {
        private readonly IMonitoringRepository monitoringRepository = new MonitoringsRepository();

        public void Monitor(string eventName, DateTime timestamp)
        {
            try
            {
                monitoringRepository.AddEvent(eventName, timestamp);
            }
            catch (Exception ex)
            {
                Error(ex);
                Warn("Monitoring iZiServer : échec de l’enregistrement d’un évènement dans la table de monitoring.");
            }
        }
    }
}

Project files

Base application .csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <OutputType>Exe</OutputType>
    <PublishSingleFile>true</PublishSingleFile>
    <PublishReadyToRun>true</PublishReadyToRun>
    <IncludeContentFilesProjectOutputGroup>true</IncludeContentFilesProjectOutputGroup>
    <IncludeSymbolsInSingleFile>true</IncludeSymbolsInSingleFile>
    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
    <Version>1.1.0.11</Version>
  </PropertyGroup>

  <ItemGroup>
    <Compile Remove="BackgroundServices\**" />
    <Content Remove="BackgroundServices\**" />
    <EmbeddedResource Remove="BackgroundServices\**" />
    <None Remove="BackgroundServices\**" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iZiServer.AutoMonitor\iZiServer.AutoMonitor.csproj" />
    <ProjectReference Include="..\iziServer.Core\iZiServer.Core.csproj" />
    <ProjectReference Include="..\iZiServer.Globals\iZiServer.Globals.csproj" />
    <ProjectReference Include="..\iziServer.Persistence\iZiServer.Persistence.csproj" />
    <ProjectReference Include="..\iziServer.WebServices\iZiServer.WebServices.csproj" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Include="Certificates\server.pfx" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="AutoMapper" Version="10.1.1" />
    <PackageReference Include="Grpc.AspNetCore" Version="2.35.0" />
  </ItemGroup>

  <ItemGroup>
    <Protobuf Include="Protos\BooleanResponse.proto" GrpcServices="None" />
    [...]
  </ItemGroup>

</Project>

Reboot component .csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <None Remove="Protos\BooleanResponse.proto" />
    <None Remove="Protos\CheckChannelService.proto" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Google.Protobuf" Version="3.14.0" />
    <PackageReference Include="Grpc.Core" Version="2.35.0" />
    <PackageReference Include="Grpc.Core.Api" Version="2.35.0" />
    <PackageReference Include="Grpc.Tools" Version="2.35.0">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="5.0.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iZiServer.Globals\iZiServer.Globals.csproj" />
    <ProjectReference Include="..\iziServer.Persistence\iZiServer.Persistence.csproj" />
  </ItemGroup>

  <ItemGroup>
    <Protobuf Include="Protos\BooleanResponse.proto" GrpcServices="None" />
    <Protobuf Include="Protos\CheckChannelService.proto" GrpcServices="Client" />
  </ItemGroup>

</Project>

Persistence component .csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="ini-parser" Version="2.5.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.3" />
    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
    <PackageReference Include="NugetLogger" Version="3.0.1" />
    <PackageReference Include="Sentry" Version="3.0.6" />
    <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
    <PackageReference Include="System.IO.Abstractions" Version="13.2.10" />
    <PackageReference Include="System.Text.Encoding.CodePages" Version="5.0.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iziServer.Core\iZiServer.Core.csproj" />
  </ItemGroup>

</Project>

Reboot component dependencies manifest

{
  "runtimeTarget": {
    "name": ".NETStandard,Version=v2.1/",
    "signature": ""
  },
  "compilationOptions": {},
  "targets": {
    ".NETStandard,Version=v2.1": {},
    ".NETStandard,Version=v2.1/": {
      "iZiServer.AutoMonitor/1.0.0": {
        "dependencies": {
          "Google.Protobuf": "3.14.0",
          "Grpc.Core": "2.35.0",
          "Grpc.Core.Api": "2.35.0",
          "Grpc.Tools": "2.35.0",
          "Microsoft.Extensions.Hosting.Abstractions": "5.0.0",
          "iZiServer.Globals": "1.0.0",
          "iZiServer.Persistence": "1.0.0"
        },
        "runtime": {
          "iZiServer.AutoMonitor.dll": {}
        }
      },
(…)
      "Grpc.Core/2.35.0": {
        "dependencies": {
          "Grpc.Core.Api": "2.35.0",
          "System.Memory": "4.5.4"
        },
        "runtime": {
          "lib/netstandard2.0/Grpc.Core.dll": {
            "assemblyVersion": "2.0.0.0",
            "fileVersion": "2.35.0.0"
          }
        }
      },
      "Grpc.Core.Api/2.35.0": {
        "dependencies": {
          "System.Memory": "4.5.4"
        },
        "runtime": {
          "lib/netstandard2.0/Grpc.Core.Api.dll": {
            "assemblyVersion": "2.0.0.0",
            "fileVersion": "2.35.0.0"
          }
        }
      },
      "Grpc.Tools/2.35.0": {},
      "ini-parser/2.5.2": {
        "runtime": {
          "lib/net20/INIFileParser.dll": {
            "assemblyVersion": "2.5.2.0",
            "fileVersion": "2.5.2.0"
          }
        }
      },
    (…)
      "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Abstractions.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {},
      "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.Extensions.Configuration.Abstractions": "5.0.0"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Relational.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
        "dependencies": {
          "Microsoft.Data.SqlClient": "2.0.1",
          "Microsoft.EntityFrameworkCore.Relational": "5.0.3"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.SqlServer.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
     (…)
      "System.Diagnostics.Process/4.3.0": {
        "dependencies": {
          "Microsoft.NETCore.Platforms": "1.1.1",
          "Microsoft.Win32.Primitives": "4.3.0",
          "Microsoft.Win32.Registry": "4.7.0",
          "System.Collections": "4.3.0",
          "System.Diagnostics.Debug": "4.3.0",
          "System.Globalization": "4.3.0",
          "System.IO": "4.3.0",
          "System.IO.FileSystem": "4.3.0",
          "System.IO.FileSystem.Primitives": "4.3.0",
          "System.Resources.ResourceManager": "4.3.0",
          "System.Runtime": "4.3.0",
          "System.Runtime.Extensions": "4.3.0",
          "System.Runtime.Handles": "4.3.0",
          "System.Runtime.InteropServices": "4.3.0",
          "System.Text.Encoding": "4.3.0",
          "System.Text.Encoding.Extensions": "4.3.0",
          "System.Threading": "4.3.0",
          "System.Threading.Tasks": "4.3.0",
          "System.Threading.Thread": "4.3.0",
          "System.Threading.ThreadPool": "4.3.0",
          "runtime.native.System": "4.3.0"
        }
      },
     (…)
  "libraries": {
    (…)
    "Grpc.Core/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-nEh7OqeJOuLl9PnJ1tpdVoginCcYd5jjKERr3fjLgcmvc7OKqObMgoSpH0I5o4vy8RP4t2Lu10FGtlnIDhCkTw==",
      "path": "grpc.core/2.35.0",
      "hashPath": "grpc.core.2.35.0.nupkg.sha512"
    },
    "Grpc.Core.Api/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-3ZpDzd5iMRBUv22hcvBqhL1yFFNfa9AccG8koco0ezbO/NMt3E0GsTf1BeIZ2G6ceFZR3fEMawpiJAlXhDEpQA==",
      "path": "grpc.core.api/2.35.0",
      "hashPath": "grpc.core.api.2.35.0.nupkg.sha512"
    },
    "Grpc.Tools/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-mVXSeJaBHfvGz74HxXwPys4BlRQlmKy4JQFMj5IewrkSLJwyw/Pnp76C/y9SomlkG8nxJDf3oNXgamM8Ua1f4g==",
      "path": "grpc.tools/2.35.0",
      "hashPath": "grpc.tools.2.35.0.nupkg.sha512"
    },
    "ini-parser/2.5.2": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-hp3gKmC/14+6eKLgv7Jd1Z7OV86lO+tNfOXr/stQbwmRhdQuXVSvrRAuAe7G5+lwhkov0XkqZ8/bn1PYWMx6eg==",
      "path": "ini-parser/2.5.2",
      "hashPath": "ini-parser.2.5.2.nupkg.sha512"
    },
    (…)
    "Microsoft.EntityFrameworkCore/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-Dd0z2X2/YVlVWNjNyeNR3+av8wsNe+yYV16xDHJoD/u6eHypPd8g31eNOPqUTDKLPkqqkV7MtzhkXo/OQYFFhA==",
      "path": "microsoft.entityframeworkcore/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-5XYcMQC8FZvYIEcMoq3gIkpWHHmfLyymZ4IjBqkNcR3Eqa5uE8Bbtv63lOAK5Nvh6fRovqRsOzvAx8kNB/3aVg==",
      "path": "microsoft.entityframeworkcore.abstractions/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.abstractions.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-4sR0ggbrdAZS7f8T5AwHxHa+/b0QyVeMAaplCWihNQJNSgA1mF+bBzdxiL5KpWAN0EZflXuFiQy0BV6FupxITQ==",
      "path": "microsoft.entityframeworkcore.analyzers/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.analyzers.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-fiWf3OWsm5/8z+J3DiSMyNz2OkBjr6IvoJ/DzC6XgArDu17sHvTG3mdUC07cEUIo4n5XV5gthgdLalt/ALD6bw==",
      "path": "microsoft.entityframeworkcore.relational/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.relational.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-T0cU7999ffojbqEVF7nTp7IoSHrzo748BQRMSmmlmKC+uluQbV18GhtLLu3aOA5Egmja8gFEuN9+QZdViA0Dfw==",
      "path": "microsoft.entityframeworkcore.sqlserver/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.sqlserver.5.0.3.nupkg.sha512"
    },
    (…)
    "System.Diagnostics.Process/4.3.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-J0wOX07+QASQblsfxmIMFc9Iq7KTXYL3zs2G/Xc704Ylv3NpuVdo6gij6V3PGiptTxqsK0K7CdXenRvKUnkA2g==",
      "path": "system.diagnostics.process/4.3.0",
      "hashPath": "system.diagnostics.process.4.3.0.nupkg.sha512"
    },
   (…)
}

Persistence component dependencies manifest

{
  "runtimeTarget": {
    "name": ".NETStandard,Version=v2.1/",
    "signature": ""
  },
  "compilationOptions": {},
  "targets": {
    ".NETStandard,Version=v2.1": {},
    ".NETStandard,Version=v2.1/": {
      "iZiServer.Persistence/1.0.0": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.EntityFrameworkCore.SqlServer": "5.0.3",
          "Newtonsoft.Json": "12.0.3",
          "NugetLogger": "3.0.1",
          "Sentry": "3.0.6",
          "System.Data.SqlClient": "4.8.2",
          "System.IO.Abstractions": "13.2.10",
          "System.Text.Encoding.CodePages": "5.0.0",
          "iZiServer.Core": "1.0.0",
          "ini-parser": "2.5.2"
        },
        "runtime": {
          "iZiServer.Persistence.dll": {}
        }
      },
     (…)
      "Microsoft.EntityFrameworkCore/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore.Abstractions": "5.0.3",
          "Microsoft.EntityFrameworkCore.Analyzers": "5.0.3",
          "Microsoft.Extensions.Caching.Memory": "5.0.0",
          "Microsoft.Extensions.DependencyInjection": "5.0.1",
          "Microsoft.Extensions.Logging": "5.0.0",
          "System.Collections.Immutable": "5.0.0",
          "System.ComponentModel.Annotations": "5.0.0",
          "System.Diagnostics.DiagnosticSource": "5.0.1"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Abstractions.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {},
      "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.Extensions.Configuration.Abstractions": "5.0.0"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Relational.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
        "dependencies": {
          "Microsoft.Data.SqlClient": "2.0.1",
          "Microsoft.EntityFrameworkCore.Relational": "5.0.3"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.SqlServer.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
     (…)
  "libraries": {
    "iZiServer.Persistence/1.0.0": {
      "type": "project",
      "serviceable": false,
      "sha512": ""
    },
    (…)
    "Microsoft.EntityFrameworkCore/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-Dd0z2X2/YVlVWNjNyeNR3+av8wsNe+yYV16xDHJoD/u6eHypPd8g31eNOPqUTDKLPkqqkV7MtzhkXo/OQYFFhA==",
      "path": "microsoft.entityframeworkcore/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-5XYcMQC8FZvYIEcMoq3gIkpWHHmfLyymZ4IjBqkNcR3Eqa5uE8Bbtv63lOAK5Nvh6fRovqRsOzvAx8kNB/3aVg==",
      "path": "microsoft.entityframeworkcore.abstractions/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.abstractions.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-4sR0ggbrdAZS7f8T5AwHxHa+/b0QyVeMAaplCWihNQJNSgA1mF+bBzdxiL5KpWAN0EZflXuFiQy0BV6FupxITQ==",
      "path": "microsoft.entityframeworkcore.analyzers/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.analyzers.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-fiWf3OWsm5/8z+J3DiSMyNz2OkBjr6IvoJ/DzC6XgArDu17sHvTG3mdUC07cEUIo4n5XV5gthgdLalt/ALD6bw==",
      "path": "microsoft.entityframeworkcore.relational/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.relational.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-T0cU7999ffojbqEVF7nTp7IoSHrzo748BQRMSmmlmKC+uluQbV18GhtLLu3aOA5Egmja8gFEuN9+QZdViA0Dfw==",
      "path": "microsoft.entityframeworkcore.sqlserver/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.sqlserver.5.0.3.nupkg.sha512"
    },
    (…)
}

[adityamandaleeka]

This sounds really interesting, but since it's not ASP.NET Core specific, I'm going to redirect it to the runtime repo.

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[adityamandaleeka]

@vitek-karas Can you please help route this?

[vitek-karas]

We've seen reports of this on occasion. The current leading theory is that:
The single-file app for netcoreapp3.1 is essentially a self-extracting executable. It extracts itself into %TEMP%\.net\appname\hash directory and then runs from there.
Since it's the TEMP, there could be tools (including the OS itself) which try to cleanup the files in TEMP.
If the app is running, some files will be locked (loaded by the runtime) and thus won't be deleted, but files not loaded by the runtime could be deleted, leaving the app in a semi-corrupted state.
The runtime is very lazy in loading assemblies, it only does so when it absolutely have to. So for example, it's very possible that the Process class and its assembly is not needed until the point where it fails.

There are at least two possible ways to workaround this (ignoring figuring out what is deleting the files and ask it not to do so):

• set DOTNET_BUNDLE_EXTRACT_BASE_DIR before running the app and point it to some directory which is not suspect of being cleaned by anything. This tells the executable to extract itself into the specified directory instead of the TEMP.
• Upgrade the app to .NET 6 - the default single-file publish in .NET 6 will not extract to disk on startup at all. It will load managed assemblies directly from the executable and so it doesn't have this problem at all. That said if the app bundles content files those would have to be converted to resources and native libraries are either left un-bundled or they would have to be extracted on startup (recreating the problem).

In future releases we're looking into changing the default extract location into a non-temp location, hopefully completely avoiding this problem.

[vitek-karas]

#58464 is the issue tracking the change of the default extract location.

Tagging subscribers to this area: @vitek-karas, @agocke, @VSadov
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Hi,

I have a recurrent and seemingly quite random runtime issue on local servers of my customers (>= Windows 10 || >= Windows Server 16) while running an ASP.NET Core server application (Kestrel) : they sometime encounter a "FileNotFound" exception on some of the libraries required by the application code.
Some general context information:

• the executable is a server operating mainly on the local network of my customers
• it is published as single-file and self-deployed (see project .csproj further)

I recently developped a workaround that consists in detecting some of these "FileNotFound" exceptions as a trigger to reboot the application, which temporarily solves the problem… unless the "System.Diagnostics.Process" library is not found itself while I try to use it to stop my running instance after launching a new one (Process.Start // Process.GetCurrentProcess().Kill()).

I ran into some quite similar reports, but they differ from my case on an essential point : they do not happen randomly at runtime.
See :

•  .NET Core 3.1 Self-contained fails with System.IO.FileNotFoundException: Could not load file or assembly 'mscorlib, Version=4.0.0.0 #34494
• Website cannot load Microsoft.EntityFrameworkCore efcore#27029

Technical description

Several major libraries could not get loaded at runtime, including the one required for the self-rebooting utility :

• System.Diagnostics.Process (log timestamp :  2022-01-20 04:33:55.9801)
• Grpc.Core (timestamp: 2022-01-20 04:12:17.3012)
• EntityFrameworkCore (timestamp: 2022-01-20 04:33:55.9641)

Target framework : netcoreapp3.1

Please remind that manually relaunching the application solves the issue (but as it is deployed at our many customers, this is not a quite suitable solution to us).

Log trace

Fichier log configuré.2022-01-20 03:57:13.6797|INFO|iZiServer|Logger instantiated. 
2022-01-20 03:57:13.7033|INFO|iZiServer|iZiServer (version : "1.1.0.11") launches "Program" 
2022-01-20 03:57:13.8460|INFO|iZiServer|Launching broadcasting service. 
2022-01-20 03:57:13.8460|INFO|iZiServer|Broadcast message : iZiServer@50050,50052 
2022-01-20 03:57:13.8460|INFO|iZiServer|iZiServer now ready to broadcast its address on UDP socket, port 8888 
2022-01-20 03:57:13.8460|INFO|iZiServer|MonitorTracabilitePictures() launches tracabilite files verification. 
2022-01-20 03:57:13.8460|INFO|iZiServer|Checking for new tracabilite files info. 
2022-01-20 03:57:17.2692|INFO|iZiServer|MonitorTracabilitePictures() exported new info. 
2022-01-20 03:57:17.2692|INFO|iZiServer|Launching iZiServer gRPC activity monitoring service. 
2022-01-20 04:12:17.3012|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad'
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at iZiServer.AutoMonitor.GrpcMonitorService.VerifyGrpcChannel(CancellationToken stoppingToken)
   at iZiServer.AutoMonitor.GrpcMonitorService.ExecuteAsync(CancellationToken stoppingToken)

 System.IO.FileNotFoundException: 
File name: 'Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad'
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at iZiServer.AutoMonitor.GrpcMonitorClient.GrpcClientTool.IsGrpcChannelUp(ILogger logger)
   at iZiServer.AutoMonitor.GrpcMonitorService.VerifyGrpcChannel(CancellationToken stoppingToken)
   at iZiServer.AutoMonitor.GrpcMonitorService.ExecuteAsync(CancellationToken stoppingToken)


2022-01-20 04:27:17.2692|INFO|iZiServer|MonitorTracabilitePictures() launches tracabilite files verification. 
2022-01-20 04:27:17.2692|INFO|iZiServer|Checking for new tracabilite files info. 
2022-01-20 04:27:17.2692|INFO|iZiServer|MonitorTracabilitePictures() exported nothing. 
2022-01-20 04:33:25.9219|INFO|iZiServer|Client discovered : 192.168.1.12 
2022-01-20 04:33:35.9536|INFO|iZiServer|Client discovered : 192.168.1.12 
2022-01-20 04:33:45.9354|INFO|iZiServer|Vérification annulée: un ping UDP plus récent a été reçu. 
2022-01-20 04:33:45.9354|INFO|iZiServer|Dernier ping UDP : 20/01/22 04:33:35.9544 
2022-01-20 04:33:55.9641|INFO|iZiServer|Dernier ping UDP : 20/01/22 04:33:35.9544 
2022-01-20 04:33:55.9641|INFO|iZiServer|Dernier appel gRPC : 01/01/70 00:00:00.0000 
2022-01-20 04:33:55.9641|INFO|iZiServer|Redémarrage automatique d’iZiServer (indisponibilité du socket gRPC détectée). 
2022-01-20 04:33:55.9641|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'Microsoft.EntityFrameworkCore, Version=5.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'
   at iZiServer.Persistence.Database.MonitoringsRepository.AddEvent(String eventName, DateTime timestamp)
   at iZiServer.Persistence.Logger.Monitor(String eventName, DateTime timestamp)

 System.IO.FileNotFoundException: 
File name: 'Microsoft.EntityFrameworkCore, Version=5.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'
   at iZiServer.Persistence.Database.MonitoringsRepository.AddEvent(String eventName, DateTime timestamp)
   at iZiServer.Persistence.Logger.Monitor(String eventName, DateTime timestamp)


2022-01-20 04:33:55.9641|WARN|iZiServer|Monitoring iZiServer : échec de l’enregistrement d’un évènement dans la table de monitoring. 
2022-01-20 04:33:55.9801|ERROR|iZiServer|System.IO.FileNotFoundException: 
File name: 'System.Diagnostics.Process, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at iZiServer.AutoMonitor.GrpcMonitorService.RebootiZiServer()
   at iZiServer.AutoMonitor.LastCallsRegistry.DelayedGrpcCallChecking(ILogger logger)
   at iZiServer.Core.TaskUtilities.FireAndForgetSafeAsync(Task task, IErrorHandler handler)

 System.IO.FileNotFoundException: 
File name: 'System.Diagnostics.Process, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at iZiServer.AutoMonitor.GrpcMonitorService.RebootiZiServer()
   at iZiServer.AutoMonitor.LastCallsRegistry.DelayedGrpcCallChecking(ILogger logger)
   at iZiServer.Core.TaskUtilities.FireAndForgetSafeAsync(Task task, IErrorHandler handler)


2022-01-20 04:56:41.8556|INFO|iZiServer|Client discovered : 192.168.1.10 
2022-01-20 04:56:51.8600|INFO|iZiServer|Client discovered : 192.168.1.10 
2022-01-20 04:57:01.8646|INFO|iZiServer|Vérification annulée: une procédure de redémarrage vient d’être lancée. 
2022-01-20 04:57:11.8640|INFO|iZiServer|Vérification annulée: une procédure de redémarrage vient d’être lancée. 

Code excerpts

Reboot utility (for System.Diagnostics.Process)

using iZiServer.AutoMonitor.GrpcMonitorClient;
using iZiServer.Core;
using iZiServer.Persistence;
using iZiServer.Persistence.Configuration;
using Microsoft.Extensions.Hosting;
using System;
using System.Diagnostics;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

namespace iZiServer.AutoMonitor
{
    public class GrpcMonitorService : BackgroundService
    {
        private ILogger logger;
        private static bool onGoingReboot = false;

        internal static void RebootiZiServer()
        {
            var logger = new Logger();
            logger.Info("Auto-reboot of iZiServer…");
            if (onGoingReboot)
            {
                logger.Info("Annulation auto-reboot : un redémarrage est déjà en cours.");
                return;
            }
            var progPath = ConfigurationAccessor.RetrieveConfiguration().ExecutableBinariesFolder;
            if (!string.IsNullOrWhiteSpace(progPath))
            {
                var iziserverPath = Path.Combine(progPath, "iZiServer.exe");
                logger?.Info("Starting new iZiServer instance…");
                Process.Start(iziserverPath);
                onGoingReboot = true;
                logger?.Info("Shutting down old iZiServer instance…");
                Process.GetCurrentProcess().Kill();
            }
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            try
            {
                logger = new Logger();
                logger?.Info("Launching iZiServer gRPC activity monitoring service.");
                var interval = TimeSpan.FromMinutes(15);
                while (!stoppingToken.IsCancellationRequested)
                {
                    await Task.Delay(interval, stoppingToken);
                    await VerifyGrpcChannel(stoppingToken);
                }
            }
            catch (OperationCanceledException ex)
            {
                logger?.Info(ex.Message);
            }
            catch (Exception ex)
            {
                logger?.Error(ex);
                throw;
            }
        }

        private async Task VerifyGrpcChannel(CancellationToken stoppingToken)
        {
            var isChannelUp = await GrpcClientTool.IsGrpcChannelUp(logger);
            logger?.Info($"iZiServer gPRC channels availability : {(isChannelUp ? "OK" : "KO")}");
            if (!stoppingToken.IsCancellationRequested && !isChannelUp)
            {
                RebootiZiServer();
            }
        }
    }
}

Log utility (for EntityFrameworkCore)

using iZiServer.Core;
using iZiServer.Core.Monitoring;
using iZiServer.Persistence.Database;
using System;

namespace iZiServer.Persistence
{
    public class Logger : NugetLogger.Logger, ILogger
    {
        private readonly IMonitoringRepository monitoringRepository = new MonitoringsRepository();

        public void Monitor(string eventName, DateTime timestamp)
        {
            try
            {
                monitoringRepository.AddEvent(eventName, timestamp);
            }
            catch (Exception ex)
            {
                Error(ex);
                Warn("Monitoring iZiServer : échec de l’enregistrement d’un évènement dans la table de monitoring.");
            }
        }
    }
}

Project files

Base application .csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <OutputType>Exe</OutputType>
    <PublishSingleFile>true</PublishSingleFile>
    <PublishReadyToRun>true</PublishReadyToRun>
    <IncludeContentFilesProjectOutputGroup>true</IncludeContentFilesProjectOutputGroup>
    <IncludeSymbolsInSingleFile>true</IncludeSymbolsInSingleFile>
    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
    <Version>1.1.0.11</Version>
  </PropertyGroup>

  <ItemGroup>
    <Compile Remove="BackgroundServices\**" />
    <Content Remove="BackgroundServices\**" />
    <EmbeddedResource Remove="BackgroundServices\**" />
    <None Remove="BackgroundServices\**" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iZiServer.AutoMonitor\iZiServer.AutoMonitor.csproj" />
    <ProjectReference Include="..\iziServer.Core\iZiServer.Core.csproj" />
    <ProjectReference Include="..\iZiServer.Globals\iZiServer.Globals.csproj" />
    <ProjectReference Include="..\iziServer.Persistence\iZiServer.Persistence.csproj" />
    <ProjectReference Include="..\iziServer.WebServices\iZiServer.WebServices.csproj" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Include="Certificates\server.pfx" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="AutoMapper" Version="10.1.1" />
    <PackageReference Include="Grpc.AspNetCore" Version="2.35.0" />
  </ItemGroup>

  <ItemGroup>
    <Protobuf Include="Protos\BooleanResponse.proto" GrpcServices="None" />
    [...]
  </ItemGroup>

</Project>

Reboot component .csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <None Remove="Protos\BooleanResponse.proto" />
    <None Remove="Protos\CheckChannelService.proto" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Google.Protobuf" Version="3.14.0" />
    <PackageReference Include="Grpc.Core" Version="2.35.0" />
    <PackageReference Include="Grpc.Core.Api" Version="2.35.0" />
    <PackageReference Include="Grpc.Tools" Version="2.35.0">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="5.0.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iZiServer.Globals\iZiServer.Globals.csproj" />
    <ProjectReference Include="..\iziServer.Persistence\iZiServer.Persistence.csproj" />
  </ItemGroup>

  <ItemGroup>
    <Protobuf Include="Protos\BooleanResponse.proto" GrpcServices="None" />
    <Protobuf Include="Protos\CheckChannelService.proto" GrpcServices="Client" />
  </ItemGroup>

</Project>

Persistence component .csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="ini-parser" Version="2.5.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.3" />
    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
    <PackageReference Include="NugetLogger" Version="3.0.1" />
    <PackageReference Include="Sentry" Version="3.0.6" />
    <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
    <PackageReference Include="System.IO.Abstractions" Version="13.2.10" />
    <PackageReference Include="System.Text.Encoding.CodePages" Version="5.0.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\iziServer.Core\iZiServer.Core.csproj" />
  </ItemGroup>

</Project>

Reboot component dependencies manifest

{
  "runtimeTarget": {
    "name": ".NETStandard,Version=v2.1/",
    "signature": ""
  },
  "compilationOptions": {},
  "targets": {
    ".NETStandard,Version=v2.1": {},
    ".NETStandard,Version=v2.1/": {
      "iZiServer.AutoMonitor/1.0.0": {
        "dependencies": {
          "Google.Protobuf": "3.14.0",
          "Grpc.Core": "2.35.0",
          "Grpc.Core.Api": "2.35.0",
          "Grpc.Tools": "2.35.0",
          "Microsoft.Extensions.Hosting.Abstractions": "5.0.0",
          "iZiServer.Globals": "1.0.0",
          "iZiServer.Persistence": "1.0.0"
        },
        "runtime": {
          "iZiServer.AutoMonitor.dll": {}
        }
      },
(…)
      "Grpc.Core/2.35.0": {
        "dependencies": {
          "Grpc.Core.Api": "2.35.0",
          "System.Memory": "4.5.4"
        },
        "runtime": {
          "lib/netstandard2.0/Grpc.Core.dll": {
            "assemblyVersion": "2.0.0.0",
            "fileVersion": "2.35.0.0"
          }
        }
      },
      "Grpc.Core.Api/2.35.0": {
        "dependencies": {
          "System.Memory": "4.5.4"
        },
        "runtime": {
          "lib/netstandard2.0/Grpc.Core.Api.dll": {
            "assemblyVersion": "2.0.0.0",
            "fileVersion": "2.35.0.0"
          }
        }
      },
      "Grpc.Tools/2.35.0": {},
      "ini-parser/2.5.2": {
        "runtime": {
          "lib/net20/INIFileParser.dll": {
            "assemblyVersion": "2.5.2.0",
            "fileVersion": "2.5.2.0"
          }
        }
      },
    (…)
      "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Abstractions.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {},
      "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.Extensions.Configuration.Abstractions": "5.0.0"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Relational.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
        "dependencies": {
          "Microsoft.Data.SqlClient": "2.0.1",
          "Microsoft.EntityFrameworkCore.Relational": "5.0.3"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.SqlServer.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
     (…)
      "System.Diagnostics.Process/4.3.0": {
        "dependencies": {
          "Microsoft.NETCore.Platforms": "1.1.1",
          "Microsoft.Win32.Primitives": "4.3.0",
          "Microsoft.Win32.Registry": "4.7.0",
          "System.Collections": "4.3.0",
          "System.Diagnostics.Debug": "4.3.0",
          "System.Globalization": "4.3.0",
          "System.IO": "4.3.0",
          "System.IO.FileSystem": "4.3.0",
          "System.IO.FileSystem.Primitives": "4.3.0",
          "System.Resources.ResourceManager": "4.3.0",
          "System.Runtime": "4.3.0",
          "System.Runtime.Extensions": "4.3.0",
          "System.Runtime.Handles": "4.3.0",
          "System.Runtime.InteropServices": "4.3.0",
          "System.Text.Encoding": "4.3.0",
          "System.Text.Encoding.Extensions": "4.3.0",
          "System.Threading": "4.3.0",
          "System.Threading.Tasks": "4.3.0",
          "System.Threading.Thread": "4.3.0",
          "System.Threading.ThreadPool": "4.3.0",
          "runtime.native.System": "4.3.0"
        }
      },
     (…)
  "libraries": {
    (…)
    "Grpc.Core/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-nEh7OqeJOuLl9PnJ1tpdVoginCcYd5jjKERr3fjLgcmvc7OKqObMgoSpH0I5o4vy8RP4t2Lu10FGtlnIDhCkTw==",
      "path": "grpc.core/2.35.0",
      "hashPath": "grpc.core.2.35.0.nupkg.sha512"
    },
    "Grpc.Core.Api/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-3ZpDzd5iMRBUv22hcvBqhL1yFFNfa9AccG8koco0ezbO/NMt3E0GsTf1BeIZ2G6ceFZR3fEMawpiJAlXhDEpQA==",
      "path": "grpc.core.api/2.35.0",
      "hashPath": "grpc.core.api.2.35.0.nupkg.sha512"
    },
    "Grpc.Tools/2.35.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-mVXSeJaBHfvGz74HxXwPys4BlRQlmKy4JQFMj5IewrkSLJwyw/Pnp76C/y9SomlkG8nxJDf3oNXgamM8Ua1f4g==",
      "path": "grpc.tools/2.35.0",
      "hashPath": "grpc.tools.2.35.0.nupkg.sha512"
    },
    "ini-parser/2.5.2": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-hp3gKmC/14+6eKLgv7Jd1Z7OV86lO+tNfOXr/stQbwmRhdQuXVSvrRAuAe7G5+lwhkov0XkqZ8/bn1PYWMx6eg==",
      "path": "ini-parser/2.5.2",
      "hashPath": "ini-parser.2.5.2.nupkg.sha512"
    },
    (…)
    "Microsoft.EntityFrameworkCore/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-Dd0z2X2/YVlVWNjNyeNR3+av8wsNe+yYV16xDHJoD/u6eHypPd8g31eNOPqUTDKLPkqqkV7MtzhkXo/OQYFFhA==",
      "path": "microsoft.entityframeworkcore/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-5XYcMQC8FZvYIEcMoq3gIkpWHHmfLyymZ4IjBqkNcR3Eqa5uE8Bbtv63lOAK5Nvh6fRovqRsOzvAx8kNB/3aVg==",
      "path": "microsoft.entityframeworkcore.abstractions/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.abstractions.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-4sR0ggbrdAZS7f8T5AwHxHa+/b0QyVeMAaplCWihNQJNSgA1mF+bBzdxiL5KpWAN0EZflXuFiQy0BV6FupxITQ==",
      "path": "microsoft.entityframeworkcore.analyzers/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.analyzers.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-fiWf3OWsm5/8z+J3DiSMyNz2OkBjr6IvoJ/DzC6XgArDu17sHvTG3mdUC07cEUIo4n5XV5gthgdLalt/ALD6bw==",
      "path": "microsoft.entityframeworkcore.relational/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.relational.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-T0cU7999ffojbqEVF7nTp7IoSHrzo748BQRMSmmlmKC+uluQbV18GhtLLu3aOA5Egmja8gFEuN9+QZdViA0Dfw==",
      "path": "microsoft.entityframeworkcore.sqlserver/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.sqlserver.5.0.3.nupkg.sha512"
    },
    (…)
    "System.Diagnostics.Process/4.3.0": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-J0wOX07+QASQblsfxmIMFc9Iq7KTXYL3zs2G/Xc704Ylv3NpuVdo6gij6V3PGiptTxqsK0K7CdXenRvKUnkA2g==",
      "path": "system.diagnostics.process/4.3.0",
      "hashPath": "system.diagnostics.process.4.3.0.nupkg.sha512"
    },
   (…)
}

Persistence component dependencies manifest

{
  "runtimeTarget": {
    "name": ".NETStandard,Version=v2.1/",
    "signature": ""
  },
  "compilationOptions": {},
  "targets": {
    ".NETStandard,Version=v2.1": {},
    ".NETStandard,Version=v2.1/": {
      "iZiServer.Persistence/1.0.0": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.EntityFrameworkCore.SqlServer": "5.0.3",
          "Newtonsoft.Json": "12.0.3",
          "NugetLogger": "3.0.1",
          "Sentry": "3.0.6",
          "System.Data.SqlClient": "4.8.2",
          "System.IO.Abstractions": "13.2.10",
          "System.Text.Encoding.CodePages": "5.0.0",
          "iZiServer.Core": "1.0.0",
          "ini-parser": "2.5.2"
        },
        "runtime": {
          "iZiServer.Persistence.dll": {}
        }
      },
     (…)
      "Microsoft.EntityFrameworkCore/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore.Abstractions": "5.0.3",
          "Microsoft.EntityFrameworkCore.Analyzers": "5.0.3",
          "Microsoft.Extensions.Caching.Memory": "5.0.0",
          "Microsoft.Extensions.DependencyInjection": "5.0.1",
          "Microsoft.Extensions.Logging": "5.0.0",
          "System.Collections.Immutable": "5.0.0",
          "System.ComponentModel.Annotations": "5.0.0",
          "System.Diagnostics.DiagnosticSource": "5.0.1"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Abstractions.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {},
      "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
        "dependencies": {
          "Microsoft.EntityFrameworkCore": "5.0.3",
          "Microsoft.Extensions.Configuration.Abstractions": "5.0.0"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.Relational.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
      "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
        "dependencies": {
          "Microsoft.Data.SqlClient": "2.0.1",
          "Microsoft.EntityFrameworkCore.Relational": "5.0.3"
        },
        "runtime": {
          "lib/netstandard2.1/Microsoft.EntityFrameworkCore.SqlServer.dll": {
            "assemblyVersion": "5.0.3.0",
            "fileVersion": "5.0.321.6417"
          }
        }
      },
     (…)
  "libraries": {
    "iZiServer.Persistence/1.0.0": {
      "type": "project",
      "serviceable": false,
      "sha512": ""
    },
    (…)
    "Microsoft.EntityFrameworkCore/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-Dd0z2X2/YVlVWNjNyeNR3+av8wsNe+yYV16xDHJoD/u6eHypPd8g31eNOPqUTDKLPkqqkV7MtzhkXo/OQYFFhA==",
      "path": "microsoft.entityframeworkcore/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Abstractions/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-5XYcMQC8FZvYIEcMoq3gIkpWHHmfLyymZ4IjBqkNcR3Eqa5uE8Bbtv63lOAK5Nvh6fRovqRsOzvAx8kNB/3aVg==",
      "path": "microsoft.entityframeworkcore.abstractions/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.abstractions.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Analyzers/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-4sR0ggbrdAZS7f8T5AwHxHa+/b0QyVeMAaplCWihNQJNSgA1mF+bBzdxiL5KpWAN0EZflXuFiQy0BV6FupxITQ==",
      "path": "microsoft.entityframeworkcore.analyzers/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.analyzers.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.Relational/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-fiWf3OWsm5/8z+J3DiSMyNz2OkBjr6IvoJ/DzC6XgArDu17sHvTG3mdUC07cEUIo4n5XV5gthgdLalt/ALD6bw==",
      "path": "microsoft.entityframeworkcore.relational/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.relational.5.0.3.nupkg.sha512"
    },
    "Microsoft.EntityFrameworkCore.SqlServer/5.0.3": {
      "type": "package",
      "serviceable": true,
      "sha512": "sha512-T0cU7999ffojbqEVF7nTp7IoSHrzo748BQRMSmmlmKC+uluQbV18GhtLLu3aOA5Egmja8gFEuN9+QZdViA0Dfw==",
      "path": "microsoft.entityframeworkcore.sqlserver/5.0.3",
      "hashPath": "microsoft.entityframeworkcore.sqlserver.5.0.3.nupkg.sha512"
    },
    (…)
}

Author:	jdaufinEcoSi
Assignees:	-
Labels:	area-AssemblyLoader-coreclr, untriaged
Milestone:	-

@vitek-karas : thank you for this precious insight; things are a lot clearer to me now. I’ll try the environment variable workaround. Concerning the content resources issue with .NET 6, I’m not sure to get it : does this mean that if, for instance, my application embeds file resources such as an SSL certificate, it’s going to alter the way of bundling the whole application, taking it back to the temporary directory extraction mode?

[vitek-karas]

.NET 6 will bundle only managed assemblies (and the runtime) by default. Embedded resources are part of the managed assembly, so those are perfectly OK. But for example data files which are not embedded will not get bundled. The default settings for .NET 6 would leave those files next to the creates executable (the result is less files, but not exactly 1). Same thing happens for any native library dependencies. You can opt into extraction, which allows bundling pretty much anything. In .NET 6 the extraction is strictly opt-in, it will NOT happen by default.

@vitek-karas : now I get the full picture, thank you very much, you’ve been really helpful on this issue.