Why is Ktor so slow to restart? Start itself is a...

# ktor

[ursus]

Why is Ktor so slow to restart?

Start itself is almost instant. But stopping seems to take like 4 seconds. Which is painful when developing - it's so much noticably slower than when working on spring.

Or is this a intellij thing?

[Jeff Hudson]

Do you have a termination grace period set?

[ursus]

not that I'm aware of, just a hello world basically (with websocket)

[Jeff Hudson]

You probably want to change the value for shutdownTimeout when running your server locally. The default is 5 seconds, which adds an intentional 5 second delay before shutting down, to let any async processes cool off

[Jeff Hudson]

https://ktor.io/docs/server-configuration-file.html#config-engine

[ursus]

hm any idea where should I pass it to if all I have is basically

fun main(args: Array<String>) {
    embeddedServer(
        factory = Netty,
        host = "0.0.0.0",
        port = 8081,
    ) {
        module()
    }.start(wait = true)
}

[Jeff Hudson]

you're on Ktor 2.0+ 3.0+ right?

[ursus]

ktor-version = "3.1.1"

[Jeff Hudson]

Oh I meant 3.0+

[Jeff Hudson]

fun main(args: Array<String>) {
    embeddedServer(
        factory = Netty,
        host = "0.0.0.0",
        port = 8081,
        configure = {
          shutdownGracePeriod = xxx
          shutdownTimeout = yyy
        }
    ) {
        module()
    }.start(wait = true)
}

[Jeff Hudson]

I think that should do it

[Jeff Hudson]

This is where we do it at my company

[ursus]

okay I see the configure overload; but then there's no host/port; guess I'll lokt into it thanks!

[Jeff Hudson]

fun main(args: Array<String>) {
    embeddedServer(
        factory = Netty,
        configure = {
          connector {
            host = "0.0.0.0"
            port = 8081
          }
          shutdownGracePeriod = xxx
          shutdownTimeout = yyy
        }
    ) {
        module()
    }.start(wait = true)
}

how about something like this?

[ursus]

works, great!

[Jeff Hudson]

yay, great to hear 🙂