vscode diagnosis problems issue after clean java language server workspace problems

Environment

• Operating System: win11 & macOS 15
• JDK version: JDK 17
• Language Support for Java(TM) by Red Hat :v1.4x.x (v.1.40-v.1.42 also)

While developing Java in VS Code, I occasionally run into resolution issues. I used to resolve them by executing the "Clean Java Language Server Workspace" command. However, I've recently observed that after using this command and restarting VS Code, the diagnostics (errors, warnings, infos) count always resets to 0.

Furthermore, diagnostics appear to only analyze files that are currently open in the editor. As a result, if a change breaks a reference in another file that isn’t opened, no error is shown—unless the affected file is explicitly opened.

The only workaround I’ve found so far is to clone the project into a new directory. Cloning into the same original path doesn't solve the issue, and clearing cache has no effect either.

首先，在报告的 Windows 和 macOS 环境中使用 VS Code 重现该问题，并在 Java 项目上使用 "Clean Java Language Server Workspace" 命令。检查重启后诊断信息是否消失，以及未打开的文件是否会被分析；当诊断信息仍然可用，并且无需打开每个受影响的文件就能报告损坏的引用时，即表示完成。