What's the recommended way to set a timeout on an endpoint in a Ktor Server?

# ktor

[dave08]

What's the recommended way to set a timeout on an endpoint in a Ktor Server?

[Aleksei Tirman [JB]]

What kind of timeout do you mean?

[dave08]

Some of my requests are hanging for more than an hour according to Istio...! I need to timeout such long requests...

[Aleksei Tirman [JB]]

So do you mean stale connections?

[dave08]

I'm not sure how these requests are hanging so much... on the client side I have this:

okHttpClient.newBuilder().apply {
			connectTimeout(30, TimeUnit.SECONDS)
			readTimeout(1, TimeUnit.MINUTES)
			writeTimeout(1, TimeUnit.MINUTES)
		}.build()

[dave08]

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[dave08]

@Aleksei Tirman [JB] I think it happens to hang while receiving headers or form parts since I have KotlinX serialization errors with what seems to be partial json being sent when these long requests take place...

[dave08]

It's confirmed in my production environment that a bunch of requests don't have complete headers or multipart bodies, and they hang for a good while... is this normal?

[CLOVIS]

If you mean for a single timeout, you can just add

withTimeout(5000) {
    …rest of your code…
}

https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/with-timeout.html

If you want to apply it to your entire application, I think you'll have to create a custom plugin. It's not hard to do

[dave08]

Yeah, that's what I was thinking... I was just wondering if I'm not the only one who has these problems, there might already be something out there that's better... 😉