com.sun.net.httpserver update

[Alan Bateman]

On 20/09/2020 12:46, Kasper Nielsen wrote:
> Hi Alan,
>
> I did some local runs using vegeta as a simple loading testing tool.
> Using Executors.newVirtualThreadExecutor() as the dispatching
> mechanism. Which worked beautifully. I was easily spawning a couple
> of hundred thousand virtual threads a second on an old laptop.
>
> But only because I spun of 1000 extra threads per request. Otherwise
> I had all kinds of issues with networking subsystem/jdk.httpserver.
>
> I think my conclusion is, that if you want to try and stress Loom with a
> thread-per-request web-server. You will need a pretty well-tuned
> test setup.
>
Thanks for confirming that it works although I'm not quite sure what you 
mean by "1000 extra threads per request". It doesn't surprise me if you 
run into scalability issues with this HTTP server. The original 
motivation for this little server was to support web services callbacks 
to a client-provided endpoint. It has been useful for small scale 
embedded usages and tests but that's about it.

You are right that HTTP load test will require at least some tuning of 
TCP parameters, esp. with short lived TCP connections. It can be useful 
to use several IP addresses with the load balanced across the addresses.

-Alan