Unable to find extension point configuration extensions/compiler.xml when running in docker

[StefanLobbenmeierObjego]

Full error is this:

Unable to initialize repl compiler:
  DEBUG Using JDK home inferred from java.home: /usr/local/openjdk-21
  DEBUG Using JVM IR backend
  DEBUG Using JVM IR backend
  ERROR Unable to find extension point configuration extensions/compiler.xml (cp:
  null): java.lang.IllegalStateException: Unable to find extension point configuration extensions/compiler.xml (cp:
  null)

I was using the spring starter:

    implementation("org.jetbrains.kotlinx:kotlin-jupyter-spring-starter:0.12.0-463")

And running the application in an container based on

FROM openjdk:21-slim

I am using spring version "3.3.6"

This is my port forward:

kubectl port-forward -n namespace podname 50500:50500 50501:50501 50502:50502 50503:50503 50504:50504 50505:50505

So far I have tried:

• using non slim version of the container (no difference)
• running locally instead (works, but not what I wanted to do)
• using a buildpack instead of Dockerfile (also same result)

pack build  --platform linux/amd64 \
            --builder paketobuildpacks/builder-jammy-base:latest \
            --buildpack paketo-buildpacks/java \
            --buildpack paketo-buildpacks/opentelemetry \
            --path "$jar_path" \
            --env BP_JVM_VERSION=21 \
            --env BP_OPENTELEMETRY_ENABLED=true \
            "$container_tag

• learned that buildpack uses jvm by default, tried using jdk instead but that version crashed
• instead tried a different jdk image FROM eclipse-temurin:21-jdk-noble, same error message

I get an error in the stdout as well:

{
  "header": {
    "msg_id": "10bf93b9-5f04-4aac-9783-2d45d99f7b84",
    "msg_type": "execute_reply",
    "session": "1ac2bd70-0125-4669-b7c4-ea8ce97b2afe",
    "username": "username",
    "version": "5.3",
    "date": "2025-07-02T16:12:01.747055880+00:00[Etc/UTC]"
  },
  "parent_header": {
    "msg_id": "68776a8b-a5c5-4171-9ee7-1455ce8ed127",
    "msg_type": "execute_request",
    "session": "1ac2bd70-0125-4669-b7c4-ea8ce97b2afe",
    "username": "username",
    "version": "5.5"
  },
  "metadata": {
    "engine": "1ac2bd70-0125-4669-b7c4-ea8ce97b2afe",
    "status": "error",
    "started": "2025-07-02T16:12:01.641491095+00:00[Etc/UTC]",
    "eval_metadata": {
      "newClasspath": [],
      "newSources": [],
      "compiledData": {
        "scripts": [],
        "sources": []
      },
      "newImports": [],
      "evaluatedVariablesState": {}
    }
  },
  "content": {
    "status": "error",
    "execution_count": 2,
    "ename": "org.jetbrains.kotlinx.jupyter.exceptions.ReplCompilerException",
    "evalue": "Unable to initialize repl compiler:\n  DEBUG Using JDK home inferred from java.home: /opt/java/openjdk\n  DEBUG Using JVM IR backend\n  DEBUG Using JVM IR backend\n  ERROR Unable to find extension point configuration extensions/compiler.xml (cp:\n  null): java.lang.IllegalStateException: Unable to find extension point configuration extensions/compiler.xml (cp:\n  null)",
    "traceback": [
      "org.jetbrains.kotlinx.jupyter.exceptions.ReplCompilerException: Unable to initialize repl compiler:",
      "  DEBUG Using JDK home inferred from java.home: /opt/java/openjdk",
      "  DEBUG Using JVM IR backend",
      "  DEBUG Using JVM IR backend",
      "  ERROR Unable to find extension point configuration extensions/compiler.xml (cp:",
      "  null): java.lang.IllegalStateException: Unable to find extension point configuration extensions/compiler.xml (cp:",
      "  null)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.JupyterCompilerImpl.compileSync(JupyterCompilerImpl.kt:208)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl.eval(InternalEvaluatorImpl.kt:126)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:80)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:78)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withHost(ReplForJupyterImpl.kt:779)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl.execute-L4Nmkdk(CellExecutorImpl.kt:78)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.execution.CellExecutor$DefaultImpls.execute-L4Nmkdk$default(CellExecutor.kt:13)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evaluateUserCode-wNURfNM(ReplForJupyterImpl.kt:601)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalExImpl(ReplForJupyterImpl.kt:459)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.access$evalExImpl(ReplForJupyterImpl.kt:140)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:452)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:451)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withEvalContext(ReplForJupyterImpl.kt:432)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalEx(ReplForJupyterImpl.kt:451)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:160)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:159)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedIn(IdeCompatibleMessageRequestProcessor.kt:354)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.access$withForkedIn(IdeCompatibleMessageRequestProcessor.kt:55)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$evalWithIO$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:368)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedErr(IdeCompatibleMessageRequestProcessor.kt:343)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.access$withForkedErr(IdeCompatibleMessageRequestProcessor.kt:55)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$evalWithIO$1.invoke(IdeCompatibleMessageRequestProcessor.kt:367)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedOut(IdeCompatibleMessageRequestProcessor.kt:335)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.evalWithIO(IdeCompatibleMessageRequestProcessor.kt:366)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1.invoke(IdeCompatibleMessageRequestProcessor.kt:159)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1.invoke(IdeCompatibleMessageRequestProcessor.kt:158)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$Task.execute(JupyterExecutorImpl.kt:41)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:83)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:80)",
      "\tat kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)",
      "Caused by: java.lang.IllegalStateException: Unable to initialize repl compiler:",
      "  DEBUG Using JDK home inferred from java.home: /opt/java/openjdk",
      "  DEBUG Using JVM IR backend",
      "  DEBUG Using JVM IR backend",
      "  ERROR Unable to find extension point configuration extensions/compiler.xml (cp:",
      "  null): java.lang.IllegalStateException: Unable to find extension point configuration extensions/compiler.xml (cp:",
      "  null)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.compiler.plugin.impl.KJvmReplCompilerBase$Companion.createCompilationState(KJvmReplCompilerBase.kt:337)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.ide_services.compiler.KJvmReplCompilerWithIdeServices$1.invoke(KJvmReplCompilerWithIdeServices.kt:30)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.ide_services.compiler.KJvmReplCompilerWithIdeServices$1.invoke(KJvmReplCompilerWithIdeServices.kt:29)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.compiler.plugin.repl.JvmReplCompilerState.initializeCompilation(jvmReplCompilation.kt:61)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.compiler.plugin.repl.JvmReplCompilerState.getCompilationState(jvmReplCompilation.kt:47)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.compiler.plugin.impl.KJvmReplCompilerBase.compile$suspendImpl(KJvmReplCompilerBase.kt:74)",
      "\tat ktnb.org.jetbrains.kotlin.scripting.compiler.plugin.impl.KJvmReplCompilerBase.compile(KJvmReplCompilerBase.kt)",
      "\tat kotlin.script.experimental.api.ReplCompiler.compile$suspendImpl(replCompilation.kt:49)",
      "\tat kotlin.script.experimental.api.ReplCompiler.compile(replCompilation.kt)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.JupyterCompilerImpl$compileSync$resultWithDiagnostics$1.invokeSuspend(JupyterCompilerImpl.kt:201)",
      "\tat kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)",
      "\tat kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)",
      "\tat io.opentelemetry.javaagent.instrumentation.kotlinxcoroutines.RunnableWrapper.lambda$stopPropagation$0(RunnableWrapper.java:16)",
      "\tat kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)",
      "\tat kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:95)",
      "\tat kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:69)",
      "\tat kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)",
      "\tat kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)",
      "\tat kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.JupyterCompilerImpl.compileSync(JupyterCompilerImpl.kt:201)",
      "\t... 35 more",
      ""
    ],
    "additionalInfo": {
    }
  }
}

Anything else I can try?

[ileasile]

Could you by any chance find out what is the actual classpath of the app you're running? Or it's a fatjar?

[StefanLobbenmeierObjego]

Yeah it should be a spring boot fatjar

I will see if there is an option to build with libs folder instead

[StefanLobbenmeierObjego]

I followed this guide how to get an exploded jar, seems it is still different from running the spring application regularly from intellij:

{
  "header": {
    "msg_id": "47833fcd-50ac-4b37-b9ea-2b1b22ff1ff5",
    "msg_type": "execute_reply",
    "username": "kernel",
    "version": "5.3",
    "date": "2025-07-03T07:52:15.726186345+00:00[Etc/UTC]"
  },
  "parent_header": {
    "msg_id": "7c487276-51de-49d3-b800-02bc8bbbb64e",
    "msg_type": "execute_request",
    "username": "kernel",
    "version": "5.3",
    "date": "2025-07-03T07:52:11.697759583+00:00[Etc/UTC]"
  },
  "metadata": {
    "engine": "",
    "status": "error",
    "started": "2025-07-03T07:52:11.908835299+00:00[Etc/UTC]",
    "eval_metadata": {
      "newClasspath": [],
      "newSources": [],
      "compiledData": {
        "scripts": [],
        "sources": []
      },
      "newImports": [],
      "evaluatedVariablesState": {}
    }
  },
  "content": {
    "status": "error",
    "execution_count": 1,
    "ename": "org.jetbrains.kotlinx.jupyter.exceptions.ReplCompilerException",
    "evalue": "at Cell In[1], line 1, column 1: Cannot access script base class 'jupyter.kotlin.ScriptTemplateWithDisplayHelpers'. Check your module classpath for missing or conflicting dependencies",
    "traceback": [
      "org.jetbrains.kotlinx.jupyter.exceptions.ReplCompilerException: at Cell In[1], line 1, column 1: Cannot access script base class 'jupyter.kotlin.ScriptTemplateWithDisplayHelpers'. Check your module classpath for missing or conflicting dependencies",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.JupyterCompilerImpl.compileSync(JupyterCompilerImpl.kt:208)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl.eval(InternalEvaluatorImpl.kt:126)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:80)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl$execute$1$result$1.invoke(CellExecutorImpl.kt:78)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withHost(ReplForJupyterImpl.kt:779)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl.execute-L4Nmkdk(CellExecutorImpl.kt:78)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.execution.CellExecutor$DefaultImpls.execute-L4Nmkdk$default(CellExecutor.kt:13)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evaluateUserCode-wNURfNM(ReplForJupyterImpl.kt:601)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalExImpl(ReplForJupyterImpl.kt:459)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.access$evalExImpl(ReplForJupyterImpl.kt:140)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:452)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl$evalEx$1.invoke(ReplForJupyterImpl.kt:451)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withEvalContext(ReplForJupyterImpl.kt:432)",
      "\tat org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalEx(ReplForJupyterImpl.kt:451)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:160)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:159)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedIn(IdeCompatibleMessageRequestProcessor.kt:354)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.access$withForkedIn(IdeCompatibleMessageRequestProcessor.kt:55)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$evalWithIO$1$1.invoke(IdeCompatibleMessageRequestProcessor.kt:368)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedErr(IdeCompatibleMessageRequestProcessor.kt:343)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.access$withForkedErr(IdeCompatibleMessageRequestProcessor.kt:55)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$evalWithIO$1.invoke(IdeCompatibleMessageRequestProcessor.kt:367)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:70)",
      "\tat org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedOut(IdeCompatibleMessageRequestProcessor.kt:335)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.evalWithIO(IdeCompatibleMessageRequestProcessor.kt:366)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1.invoke(IdeCompatibleMessageRequestProcessor.kt:159)",
      "\tat org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor$processExecuteRequest$1$response$1.invoke(IdeCompatibleMessageRequestProcessor.kt:158)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$Task.execute(JupyterExecutorImpl.kt:41)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:83)",
      "\tat org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$executorThread$1.invoke(JupyterExecutorImpl.kt:80)",
      "\tat kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)",
      ""
    ],
    "additionalInfo": {
      "lineStart": 1,
      "colStart": 1,
      "lineEnd": 1,
      "colEnd": 2,
      "message": "Cannot access script base class 'jupyter.kotlin.ScriptTemplateWithDisplayHelpers'. Check your module classpath for missing or conflicting dependencies",
      "path": "Line_0.jupyter.kts"
    }
  }
}

I guess this error message could be because I am on kotlin 2.0.0 and there is no release for it, just one for 1.9.25 and one for 2.2.0. I will need to try to use kotlin 2.2.0 in my project