Hi everyone. I’m using Ktor to make a localhost. I want it can be restarted so this is what I have d...

# ktor

[Tung97 Hl]

Hi everyone. I’m using Ktor to make a localhost. I want it can be restarted so this is what I have done:
• Create embeddedServer
• Start it by function start(wait = true)
• Stop it by function stop()
• Create new instance of embeddedServer then start it again.
I don’t know why whenever I restart the server it’s always throw exception: port already in use. Is the port does not released by Ktor or I was doing wrong?

[simon.vergauwen]

What target are you using? On JVM I don't encounter this issue, but on native targets I have also encountered this issue.

Perhaps you can try increasing the time of passed to ApplicationEngine.stop for gracePeriod and timeout.

[Tung97 Hl]

Yes I’m used as JVM target. So can you suggest me how to restart Ktor server correctly?

[simon.vergauwen]

I would try stop(3, 5, TimeUnit.SECONDS) but there are some other tickets that suggest you might even need longer times depending on which engine you use.

[simon.vergauwen]

With restarted you mean inside your code right, not killing and restarting the JVM instance? If the latter, I would suggest using SuspendApp.

[Tung97 Hl]

Thank you I’m checking it