在 Azure Function 中启用同步 IO [英] Enable Synchronous IO in Azure Function

问题描述

我正在构建一个 HTTPTriggered Azure 函数，目标是运行 GraphQL .NET 服务器的 netcoreapp3.0.GraphQL .NET 要求将 AllowSynchronousIO 设置为 true，但我不知道如何为 Azure 函数做到这一点.我已经尝试实现我自己的 Startup 类，它扩展了 FunctionsStartup 并在 Configure 方法中添加了以下代码，但没有成功.

I am building a HTTPTriggered Azure Function, targeting netcoreapp3.0, that is running a GraphQL .NET server. GraphQL .NET requires that AllowSynchronousIO is set to true, but I can't figure out how to do that for a Azure Function. I have tried implementing my own Startup class that extends FunctionsStartup and added the below code in the Configure method with no luck.

builder.Services
    .AddOptions<KestrelServerOptions>()
    .Configure<IConfiguration>((settings, configuration) =>
    {
        settings.AllowSynchronousIO = true;
        configuration.Bind(settings);
    });

我得到的错误信息是:

发生了未处理的主机错误.

An unhandled host error has occurred.

Microsoft.AspNetCore.Server.Kestrel.Core:同步操作是不允许.调用 WriteAsync 或将 AllowSynchronousIO 设置为 true.

Microsoft.AspNetCore.Server.Kestrel.Core: Synchronous operations are disallowed. Call WriteAsync or set AllowSynchronousIO to true instead.

任何帮助将不胜感激！

推荐答案

将环境变量 FUNCTIONS_V2_COMPATIBILITY_MODE 设置为 true 似乎可以解决问题，请参阅 https://github.com/Azure/azure-functions-host/pull/5286.

Setting the environment variable FUNCTIONS_V2_COMPATIBILITY_MODE to true seems to solve the issue, see https://github.com/Azure/azure-functions-host/pull/5286.

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