performance - 如何解决“Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException：由于数据到达太慢导致读取请求正文超时”？

Question

在进行 API 性能测试时 [例如，线程数/用户数：50，循环计数：10]，由于以下异常，使用 POST 方法的 5% 到 8% 样本失败：

**Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Reading the request body timed out due to data arriving too slowly. See MinRequestBodyDataRate.**
   at Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException.Throw(RequestRejectionReason reason)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1MessageBody.PumpAsync()
   at System.IO.Pipelines.PipeCompletion.ThrowLatchedException()
   at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result)
   at System.IO.Pipelines.Pipe.GetReadAsyncResult()
   at System.IO.Pipelines.Pipe.DefaultPipeReader.GetResult(Int16 token)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.MessageBody.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpRequestStream.ReadAsyncInternal(Memory`1 buffer, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.WebUtilities.FileBufferingReadStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.WebUtilities.StreamHelperExtensions.DrainAsync(Stream stream, ArrayPool`1 bytePool, Nullable`1 limit, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Mvc.Formatters.JsonInputFormatter.ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
   at Microsoft.AspNetCore.Mvc.ModelBinding.Binders.BodyModelBinder.BindModelAsync(ModelBindingContext bindingContext)
   at Microsoft.AspNetCore.Mvc.ModelBinding.ParameterBinder.BindModelAsync(ActionContext actionContext, IModelBinder modelBinder, IValueProvider valueProvider, ParameterDescriptor parameter, ModelMetadata metadata, Object value)

你能建议我如何解决这个问题吗？

注意：我在 POST 方法中正确实现了 async/await。这仅发生在 POST 方法中，在 500 个样本中，每个 POST 方法只有 20 到 40 个样本失败。在测试时提供相同的输入。

标签： performanceasp.net-coreasp.net-core-webapi

Answer 1

您可以将KestrelServerLimits.MinRequestBodyDataRate属性设置为 null，Program.cs如下所示：

.UseKestrel(opt =>
{
    opt.Limits.MinRequestBodyDataRate = null;
});

参考：

KestrelServerLimits.MinRequestBodyDataRate 属性