aspnetcore: ASP.NET Core - Performance - Load Testing issue Microsoft.AspNetCore.Server.Kestrel[13] Connection id "xyz", Request id "abc" An unhandled exception was thrown by the application.

Hello,

testing an ASP.NET Core API under load gives following error:

**fail:** _Microsoft.AspNetCore.Server.Kestrel[13]
      Connection id "0HLTTTNCMN23D", Request id "0HLTTTNCMN23D:00000002": An unhandled exception was thrown by the application.
Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Unexpected end of request content._

Load test settings: 4000 concurrent requests coming each second for a duration of 1 minute

I am using JMeter for load testing. This issue does not arise for 2000 concurrent users.

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 2
Comments: 33 (14 by maintainers)

Most upvoted comments

This stack trace implies there’s an issue in Kestrel rather than the form reader.

   at System.IO.Pipelines.Pipe.DefaultPipeReader.AdvanceTo(SequencePosition consumed)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1ContentLengthMessageBody.<ReadAsyncInternal>g__ResetReadingState|9_0()
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1ContentLengthMessageBody.ReadAsyncInternal(CancellationToken cancellationToken)

The BadHttpRequestException: Unexpected end of request content from the original post points to possibly the same place, though the BadHttpRequestException wouldn’t have been thrown if you hit the other exception given above. https://github.com/dotnet/aspnetcore/blob/e3d3da3546aa2085aa39520f3c302d0672e5bab8/src/Servers/Kestrel/Core/src/Internal/Http/Http1ContentLengthMessageBody.cs#L91-L95

ResetReadingState is called for timeouts, early end of bodies, and cancellation tokens. It doesn’t look like any cancellation tokens are used by default in this call stack. Early end of body matches the other callstack. If you are able to reproduce this with Debug or Trace level logs it might help narrow it down.

Tratcher on Apr 13, 2020