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KTConf

@ktconf.bsky.social

(/ˈkeɪti/ Kay-Tee) Conf A belgian kotlin developer conference, the second edition on Friday 18/09/2026 in Museum M, Leuven, Belgium. Hope to see you there! Website: https://ktconf.be Discord: https://discord.gg/unqnpKCJBf

9 Posts25 Follower21 Folgt
Amanda Hinchman-Dominguez@amanda-hinchman.bsky.social · 3w ago

Were you able to guess option B? If you did, can you explain why, and how to fix it?

The answer is B - SupervisorJob severed the parent-child cancellation link! Can you explain why, and how to fix it? See the repost Alt Text for the problem once more.
Amanda Hinchman-Dominguez@amanda-hinchman.bsky.social · 3w ago

Engineers, this coroutines puzzle is for you! Take a look at the code. The request failed, and requestScope.cancel() was explicitly called in onFailure. Why is the OCR engine still running in the background? You have 24 hours 😉 Check again in a day for the answer and part 2 of this challenge.

The request failed, and requestScope.cancel() was explicitly called in the onFailure block. Why is the OCR engine still running in the background? fun processUpload(requestScope: CoroutineScope): CoroutineScope { val processScope = CoroutineScope(requestScope.coroutineContext + SupervisorJob()) processScope.launch { while (isActive) { println(" Processing PDF OCR chunk...") delay(30.milliseconds) } } throw IOException("Client disconnected!") } fun main() = runBlocking { val requestScope = CoroutineScope(Dispatchers.Default + Job()) runCatching { processUpload(requestScope) }.onFailure { println("Client disconnected") requestScope.cancel() } delay(1000.milliseconds) } A) requestScope.cancel() wasn't called in time. B) SupervisorJob severed the parent-child cancellation link. C) runCatching swallowed the CancellationException. D) while (isActive) does
Amanda Hinchman-Dominguez@amanda-hinchman.bsky.social · 3w ago

Engineers, this coroutines puzzle is for you! Take a look at the code. The request failed, and requestScope.cancel() was explicitly called in onFailure. Why is the OCR engine still running in the background? You have 24 hours 😉 Check again in a day for the answer and part 2 of this challenge.

The request failed, and requestScope.cancel() was explicitly called in the onFailure block. Why is the OCR engine still running in the background? fun processUpload(requestScope: CoroutineScope): CoroutineScope { val processScope = CoroutineScope(requestScope.coroutineContext + SupervisorJob()) processScope.launch { while (isActive) { println(" Processing PDF OCR chunk...") delay(30.milliseconds) } } throw IOException("Client disconnected!") } fun main() = runBlocking { val requestScope = CoroutineScope(Dispatchers.Default + Job()) runCatching { processUpload(requestScope) }.onFailure { println("Client disconnected") requestScope.cancel() } delay(1000.milliseconds) } A) requestScope.cancel() wasn't called in time. B) SupervisorJob severed the parent-child cancellation link. C) runCatching swallowed the CancellationException. D) while (isActive) does
Ivan “CLOVIS” Canet@ivcanet.bsky.social · last yr.

Join us this September! ktconf.be/speakers/iva...

Ivan "CLOVIS" Canet

Ivan loves code and dislikes magic. He discovered Kotlin in 2017 while writing a client-side API that would be duplicated between the JVM and JS and evaluating different multiplatform solutions. He’s ...

ktconf.be

KTConf@ktconf.bsky.social · last yr.

KTConf 2025 schedule is live! 🗓️🔥 Talks by Ivan Canet, Simon Vergauwen, Duncan McGregor, Alejandro Serrano Mena and others. 🎤 Kotlin, FP, MongoDB, and smart code insights. 📍 Sept 19 – Terhills Hotel, Belgium 🎟️ Tickets available: ktconf.be #ktconf #kotlin #devconference #programming #belgium

Kotlin by JetBrains@kotlinlang.org · last yr.

Strengthening Kotlin for backend development: @jetbrains.com partners with the Spring team! 🎉 🤝 This strategic partnership is a part of our continued efforts to make Kotlin a top choice for professional server-side work. Read the full news: blog.jetbrains.com/kotlin/2025/...

Strengthening Kotlin for Backend Development: A Strategic Partnership With Spring | The Kotlin Blog

We’re excited to announce a deepened collaboration between JetBrains and the Spring team as part of our continued efforts to make Kotlin a top choice for professional server-side work.

blog.jetbrains.com