Sounds a lot like a concurrency issue - possibly not flushing the request, or
the request is being processed / timing out from another go routine. I would
start by adding some lifecycle request traces and processing these in an
automated fashion - almost the only way to debug highly concurrent issues.
Also, did you try running the server with “race detection” turned on - this
might be your best and easiest bet.
> On Jan 22, 2019, at 9:52 AM, Tom Cook <tom.k.c...@gmail.com> wrote:
>
> I have a moderately complex HTTP server written using net/http HandlerFuncs.
> Testing one request at a time all is well, but when I start putting
> significant load on it, it sometimes returns empty packets, ie no HTTP
> response headers, no status code, nothing. The clients are all written using
> Python requests and report BadstatusLine("").
>
> I don't have a straightforward way of reproducing this without all the
> relevant software (and indeed hardware) being configured, and it's still
> possible that there is some code path through my code that ends without
> writing anything into the HttpResponse, though I have spent quite a few hours
> reviewing the code for this possibility and can't see how it would happen.
>
> Does anyone know if there are conditions where the net/http server can do
> this? The load during system startup might be considered high, but it's
> maybe ten requests per second high, not thousands, though the hardware is
> relatively limited (think RPi2 and you're not too far wrong). I'm using a
> custom mux, but it's a copy-and-paste of net/http.ServeMux with some extra
> logging added.
>
> Thanks for any help,
> Tom
>
>
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