microsoft / microsoft/azure-tools-for-java
[IntelliJ] Uncaught Exception Scheduler worker in group main failed with an uncaught exception java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/csv/CsvMapper
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- Dominant language
- Java
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- Avg merge
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Description
IntelliJ build version: 2025.3.4 IU-253.32098.37
OS: Mac OS X
JDK: JetBrains s.r.o. 21.0.10
Plugin version: 3.97.3-2025.3
Additional Info: None
Parent component:
com.intellij.openapi.wm.impl.IdeRootPane[,0,0,1400x842,layout=com.intellij.openapi.wm.impl.IdeRootPane$CustomHeaderRootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]
Error message:
IdeaLoggingEvent[message=Scheduler worker in group main failed with an uncaught exception, throwable=java.lang.NoClassDefFoundError: <REDACTED: user-file-path>
at com.microsoft.azure.toolkit.intellij.azuresdk.service.AzureSdkLibraryService.<clinit>(AzureSdkLibraryService.java:49)
at com.microsoft.azure.toolkit.intellij.azuresdk.enforcer.AzureSdkEnforcer.enforce(AzureSdkEnforcer.java:42)
at com.microsoft.azure.toolkit.intellij.azuresdk.ProjectSdkIntrospectionStartupActivity.lambda$execute$0(ProjectSdkIntrospectionStartupActivity.java:51)
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.dataformat.csv.CsvMapper PluginClassLoader(plugin=PluginMainDescriptor(name=Azure Toolkit for IntelliJ, id=com.microsoft.tooling.msservices.intellij.azure, version=3.97.3-2025.3, isBundled=false, path=~
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with AzureSdkLibraryService.java:49 and the ProjectSdkIntrospectionStartupActivity stack-trace entry point, then inspect how the Azure Toolkit for IntelliJ plugin packages its Jackson dependencies. Verify the failure during IntelliJ startup and confirm that the scheduler no longer reports the missing CsvMapper class.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- build-system, devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100