ClassNotFoundException on Windows when user path contains spaces #150
Description
Relevance Confirmation
- I confirmed that this is not an issue with the Eclipse JDT Language Server itself
What happened?
When attempting to use the Java extension on Windows with a user profile path that contains spaces (e.g., C:\Users\U. Fernando Curiel), the language server fails to start.
The error occurs because the paths passed to the -javaagent (for Lombok) and -Dosgi.sharedConfiguration.area arguments are not quoted. This causes the Java process to interpret parts of the path as the main class name.
In the logs, this manifests as a ClassNotFoundException for the part of the name after the space:
2025-12-16T10:47:18-06:00 ERROR [project::lsp_store] Failed to start language server "jdtls": initializing server jdtls, id 3
Caused by:
Request timed out
2025-12-16T10:47:18-06:00 ERROR [project::lsp_store] server stderr: Error: Could not find or load main class Fernando
Caused by: java.lang.ClassNotFoundException: Fernando
The complete command being executed shows the issue clearly:
2025-12-16T10:45:18-06:00 INFO [lsp] starting language server process.
binary path: "C:\\nvm4w\\nodejs\\node.exe",
working directory: "C:\\Users\\U. Fernando Curiel\\Projects\\project-path",
args: [
...
"-Dosgi.sharedConfiguration.area=C:/Users/U. Fernando Curiel/AppData/Local/Zed/extensions/work/java/jdtls/jdt-language-server-1.54.0-202511261751/config_win",
...
"-javaagent:C:/Users/U. Fernando Curiel/AppData/Local/Zed/extensions/work/java/lombok/lombok-1.18.42.jar",
...
"-data", "C:\\Users\\U. Fernando Curiel\\AppData\\Roaming/jdtls-b3a104c2a1ab92211ad20991f09dd4df8cc15997"
]
What did you expect to happen?
The language server should start correctly regardless of whether the user's path contains spaces or not. The extension should properly quote paths in arguments passed to the Java process to handle this scenario on Windows.
Environment
Zed: v0.216.1
Platform: Windows 11
Java: OpenJDK 21.0.2