microsoft / microsoft/azure-tools-for-java
[IntelliJ] Uncaught Exception Exception thrown by subscriber method onEvent(com.microsoft.azure.toolkit.lib.common.event.AzureEvent) on subscriber com.microsoft.azure.toolkit.lib.common.event.AzureEventBus$EventListener@286e4d74 when dispatching event: com
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- Java
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Description
IntelliJ build version: 2026.1.4 IU-261.26222.65
OS: Windows 11
JDK: JetBrains s.r.o. 25.0.3
Plugin version: 3.97.6-2026.1
Additional Info: None
Parent component:
com.intellij.openapi.wm.impl.IdeRootPane[,8,8,1920x1032,layout=com.intellij.openapi.wm.impl.IdeRootPane$CustomHeaderRootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]
Error message:
IdeaLoggingEvent[message=Exception thrown by subscriber method onEvent(com.microsoft.azure.toolkit.lib.common.event.AzureEvent) on subscriber com.microsoft.azure.toolkit.lib.common.event.AzureEventBus$EventListener@286e4d74 when dispatching event: com.microsoft.azure.toolkit.lib.common.event.AzureEventBus$SimpleEvent@6181d5f7, throwable=java.util.ConcurrentModificationException
at <REDACTED: user-file-path>$LinkedHashIterator.nextNode(LinkedHashMap.java:1024)
at com.microsoft.azure.toolkit.lib.common.model.AbstractAzResourceModule.list(AbstractAzResourceModule.java:146)
at com.microsoft.azure.toolkit.lib.common.model.AbstractAzService.list(AbstractAzService.java:50
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 at AbstractAzResourceModule.list, especially line 146, then follow how AbstractAzService.list is reached during AzureEvent dispatch. Use the reported IntelliJ, Windows, JDK, and plugin versions as reproduction context; done means the reported event no longer produces a ConcurrentModificationException.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Needs clarification
- Newbie friendliness
- 42/100