microsoft / microsoft/azure-tools-for-java
[IntelliJ] Uncaught Exception Operator called default onErrorDropped reactor.core.Exceptions$ErrorCallbackNotImplemented: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fal
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Description
IntelliJ build version: 2025.3.3 IU-253.31033.145
OS: Windows 11
JDK: JetBrains s.r.o. 21.0.10
Plugin version: 3.97.3-2025.3
Additional Info: None
Parent component:
com.intellij.openapi.wm.impl.IdeRootPane[,8,8,2560x1380,layout=com.intellij.openapi.wm.impl.IdeRootPane$CustomHeaderRootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]
Error message:
IdeaLoggingEvent[message=Operator called default onErrorDropped, throwable=reactor.core.Exceptions$ErrorCallbackNotImplemented: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fallback has been configured)
Caused by: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fallback has been configured)
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 by reproducing the report with IntelliJ IU-253.31033.145 on Windows 11, JDK 21.0.10, and plugin 3.97.3-2025.3, then inspect the logged Reactor timeout and the related IntelliJ plugin operation. Done means the cause of the uncaught onErrorDropped TimeoutException is identified and the issue no longer occurs or has a verified handling path.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- azure, java
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100