In my Spring service, I get an error when I try to...

# koog-agentic-framework

[Akram Bensalem]

In my Spring service, I get an error when I try to call:

val executor = simpleOllamaAIExecutor()
    val systemPrompt = "You are a helpful assistant. Answer user questions concisely."

    val model: LLModel = LLModel(
        provider = LLMProvider.OpenRouter,
        id = "deepseek-r1:7b",
        capabilities = listOf(LLMCapability.Schema.JSON.Simple)
    )

val agent: AIAgent = simpleSingleRunAgent(
    executor = executor,
    llmModel = model,
    systemPrompt = systemPrompt
)

2025-05-24T09:39:55.893+02:00 ERROR 14781 --- [PhDGTnumGoData] [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Async processing failed: java.lang.NoSuchMethodError: 'kotlinx.coroutines.CoroutineDispatcher kotlinx.coroutines.CoroutineDispatcher.limitedParallelism$default(kotlinx.coroutines.CoroutineDispatcher, int, java.lang.String, int, java.lang.Object)'] with root cause

java.lang.NoSuchMethodError: 'kotlinx.coroutines.CoroutineDispatcher kotlinx.coroutines.CoroutineDispatcher.limitedParallelism$default(kotlinx.coroutines.CoroutineDispatcher, int, java.lang.String, int, java.lang.Object)'
	at ai.koog.agents.core.feature.AIAgentPipeline.<init>(AIAgentPipeline.kt:49) ~[agents-core-jvm-0.1.0.jar:0.1.0]
	at ai.koog.agents.core.agent.AIAgent.<init>(AIAgent.kt:104) ~[agents-core-jvm-0.1.0.jar:0.1.0]
	at ai.koog.agents.ext.agent.AIAgentExtKt.simpleSingleRunAgent(AIAgentExt.kt:87) ~[agents-ext-jvm-0.1.0.jar:0.1.0]
	at ai.koog.agents.ext.agent.AIAgentExtKt.simpleSingleRunAgent$default(AIAgentExt.kt:69) ~[agents-ext-jvm-0.1.0.jar:0.1.0]
	at fr.gtnum.imt.phdgtnumgodata.service.AIAgentService.hello$suspendImpl(AIAgentService.kt:25) ~[main/:na]
	at fr.gtnum.imt.phdgtnumgodata.service.AIAgentService.hello(AIAgentService.kt) ~[main/:na]
	at fr.gtnum.imt.phdgtnumgodata.controller.AIAgentController.hello$suspendImpl(AIAgentController.kt:27) ~[main/:na]
	at fr.gtnum.imt.phdgtnumgodata.controller.AIAgentController.hello(AIAgentController.kt) ~[main/:na]

[Didier Villevalois]

You should put your code in the thread. 😊

[Didier Villevalois]

Are you sure you have a recent kotlinx-coroutines version. One that has the limitedParallelism feature? It looks to me that you have either a classloader problem due to Spring or incorrect versions of Kotlin and Kotlinx libraries

[Akram Bensalem]

Yes, I have the recent kotlinx-coroutines version 1.8.1

[Didier Villevalois]

It looks like the method that is called takes a string, so I would guess it is the variant introduced in the 1.9.0 version. Have you tried bumping to the more recent 1.10.2 version?

[Didier Villevalois]

Yep, looking at Koog's version catalog, you're definitely using way too old versions:
https://github.com/JetBrains/koog/blob/develop/gradle/libs.versions.toml

[Akram Bensalem]

I will check right now, thank you

[Pavel Gorgulov]

By the way, you might have a mistake here.
You declare the Ollama executor, but you’re using the OpenRouter provider.
I think you can use the proper simpleOpenRouterExecutor instead

[Akram Bensalem]

I find it difficult to use a local model, from Ollama with "deepseek-r1:7b" model
Is there any way to do it?

[Didier Villevalois]

@Akram Bensalem you'd have to use develop. There were some APIs introduced to facilitate custom model use with OllamaClient. Disclaimer: those are subject to change.