workspace/symbol fails with "defines 1 params but received none" for microprofile/java/workspaceLabels in 0.18.0

[sschulze]

Hi,

starting a workspace symbol search (e.g. Cmd/Ctrl+T "Go to Symbol in Workspace") triggers a workspace/symbol request on every keystroke. In v0.18.0, this fails consistently with:

[Error - 14:17:13] Request workspace/symbol failed.
Message: Request microprofile/java/workspaceLabels defines 1 params but received none.
Code: -32602

This does not happen on v0.17.0, where the extension logs a clean startup and searches work without error.

Steps to reproduce

1. Install redhat.vscode-microprofile 0.18.0 alongside redhat.java (tested with 1.55.0)
2. Open a Java/Quarkus/MicroProfile project
3. Open "Go to Symbol in Workspace" (Cmd/Ctrl+T) and start typing a class name
4. Observe repeated errors in the "Tools for MicroProfile" output channel, one per keystroke

Expected behavior

No error; workspace symbol search works as it did in 0.17.0.

Actual behavior

Every workspace/symbol request fails with error code -32602 ("defines 1 params but received none") for the microprofile/java/workspaceLabels request.

Environment

• vscode-microprofile: 0.18.0 (0.18.0-20260824-1310) — regression not present in 0.17.0
• redhat.java (Language Support for Java): 1.55.0
• OS: macOS (darwin-arm64)

Workaround

Downgrading redhat.vscode-microprofile back to 0.17.0 resolves the issue.

Log excerpt

Aug. 28, 2026 2:14:56 PM org.eclipse.lsp4mp.ls.MicroProfileLanguageServer initialize
INFORMATION: Initializing MicroProfile server 0.18.0-20260824-1310 with .../redhat.java-1.55.0-darwin-arm64/jre/21.0.11-macosx-aarch64
[Error - 14:15:18] Request workspace/symbol failed.
Message: Request microprofile/java/workspaceLabels defines 1 params but received none.
Code: -32602