redhat-developer / redhat-developer/vscode-java
The LSP hangs on Setting classpath containers
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Description
Describe the bug
Quite often, when I use a Maven project, the LSP hangs on "Setting classpath containers":
65408615 LookupJDKToolchainsJob [Done]
6dd03634 Setting classpath containers - 59% Refreshing '/hello-world'.
Then I have to run Java: Clean Language Server Workspace to fix the LSP.
To Reproduce
The issue is not always reproducible. When I manage to reproduce it I will attach the log files.
Expected behavior
The LSP should never hang.
Environment
- Operating System: NixOS 26.05
- JDK version: OpenJDK 25.0.4
- Visual Studio Code version: 1.124.2
- Java extension version: 1.55.0
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 Maven-project hang at “Setting classpath containers” and capture the log files requested in the issue. Compare the behavior before and after running “Java: Clean Language Server Workspace”; done means the language server no longer hangs during classpath setup.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, vscode
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100