microsoft / microsoft/azure-tools-for-java
[IntelliJ] Uncaught Exception java.lang.NullPointerException: Cannot invoke "com.intellij.openapi.vfs.VirtualFile.getExtension()" because "virtualFile" is null
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Description
IntelliJ build version: 2026.1.2 IU-261.24374.151
OS: Mac OS X
JDK: JetBrains s.r.o. 25.0.2
Plugin version: 3.97.6-2026.1
Additional Info: None
Parent component:
com.intellij.openapi.wm.impl.IdeRootPane[,0,0,2560x1409,layout=com.intellij.openapi.wm.impl.IdeRootPane$CustomHeaderRootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]
Error message:
IdeaLoggingEvent[message=null, throwable=java.lang.NullPointerException: Cannot invoke "com.intellij.openapi.vfs.VirtualFile.getExtension()" because "virtualFile" is null
at org.wso2.lsp4intellij.IntellijLanguageClient.lambda$isExtensionSupported$6(IntellijLanguageClient.java:174)
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Research direction
The stack trace points to org.wso2.lsp4intellij.IntellijLanguageClient.java:174, in isExtensionSupported. Read that method and inspect how virtualFile can be null, then try to reproduce the report on IntelliJ 2026.1.2. Done means the reported uncaught NullPointerException no longer occurs for the affected case.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 45/100