NullPointerException in Jakarta EE Server Initialization

When clicking on variables in a Java project, an error occurs in the Jakarta EE server initialisation process. The error message indicates a NullPointerException during the execution of the org.eclipse.lsp4j.Diagnostic.getCode() method, specifically when trying to invoke org.eclipse.lsp4j.jsonrpc.messages.Either.getLeft(). As a result, the request textDocument/codeAction fails repeatedly, showing error code -32603. Additionally, in some cases, there are warnings for unmatched cancel notifications and errors indicating that the client is not running.

Environment

• Operating System: MacOS (Ventura 13.4)
• JDK version: temurin-11
• Visual Studio Code version: 1.80.1
• Java extension version: Latest at this time (1.20.0 I believe)

Steps To Reproduce

1. Build project, open file.
2. Click somewhere within the code.
3. See error.

Current Result

Expected Result

No errors.

Additional Informations

java-server.log

まず、記載されている MacOS、JDK、VS Code、Java 拡張機能の環境で失敗を再現し、その後 java-server.log を調べます。org.eclipse.lsp4j.Diagnostic.getCode() と Either.getLeft() 周辺の textDocument/codeAction パスを追跡します。Java プロジェクト内をクリックしても、NullPointerException や繰り返し発生する -32603 エラーが出なくなれば完了です。