Java LSP (jdtls) does not work on Zed Remote Server (WSL/NixOS) while other LSP works

[anshiq]

Relevance Confirmation

• I confirmed that this is not an issue with the Eclipse JDT Language Server itself

What happened?

Environment

• Host: Windows
• Remote: NixOS running in WSL
• Editor: Zed 1.13.2 5cdb7ab9d9546db683132cfa78e68acec3064cac – \?\C:\Users\my_user_name\AppData\Local\Programs\Zed\Zed.exe
• Java extension: Installed
• Jdtls: In global PATH
• Other Lsp gopls: Works correctly

Language Servers

Both language servers are installed and available in the remote environment.

$ which gopls
/etc/profiles/per-user/nixos/bin/gopls

$ which jdtls
/etc/profiles/per-user/nixos/bin/jdtls

Expected Behavior

Opening a Test.java file or a Java project on the remote server should start jdtls and provide Java language features (diagnostics, completion, navigation, etc.), just like Go does with gopls.

Actual Behavior

• Go projects work correctly.
• Java projects do not start the language server.
• No Java language features are available.

Log Output

The only relevant error I can find is:

/home/nixos/.local/share/zed/logs/server-workspace-55.log

{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: java-eclipse-jdtls, No extension manifest found for extension java-eclipse-jdtls"}

What I've Tried

• Installed the Java extension in Zed.
• Verified jdtls is installed and available in PATH.
• Modified both global and ~/.config/zed/settings.json multiple times using various configurations found online.
• Restarted the remote server multiple times.
• Created hard symlink at ~/.local/share/zed/extensions/work/java-eclipse-jdtls/eclipse.jdt.ls/bin for both names jdtls & java-eclipse-jdtls

Nothing has resolved the issue.

Additional Information

• Java works correctly when using Zed locally on Windows.
• The issue only occurs when using the Zed Remote Server connected to my NixOS WSL environment.
• Go (gopls) works perfectly in the exact same remote setup, so remote LSP functionality appears to be working in general.
• This jdtls binary working I tried with helix editor and neovim.

Is there something specific required for Java extensions on the remote server? The log suggests the remote server cannot find the extension manifest:

Could this indicate that the Java extension is not being installed or synchronized to the remote server?
If anything you need to get from me like logs output, config(since I changed many time it is mess right now) or something tell me I will give you that also.

What did you expect to happen?

I work in spring boot and my other dev setup for golang and frontend is in wsl, So I would be good If I can move my java backend services in wsl also

Environment

Zed: Zed 1.13.2 5cdb7ab9d9546db683132cfa78e68acec3064cac – \?\C:\Users\anshi\AppData\Local\Programs\Zed\Zed.exe
Platform: Wsl (nixos latest) inside window 11 latest.
Java: OpenJDK v21.0.6

[tartarughina]

@anshiq could you share the logs from your remote Zed instance? Considering NixOs though, you're likely required to compile the proxy yourself.

You can refer to the README on how to do the compilation and how to tell the extension to use that compiled proxy specifically.

[tartarughina]

See a similar issue #261

[tartarughina]

@anshiq And I just noticed that you are using the other Java extension java-eclipse-jdtls.

We are just Java in the extension marketplace

[anshiq]

server-workspace-51.log this is log file from my nixos path /home/nixos/.local/share/zed/logs/

[anshiq]

@anshiq And I just noticed that you are using the other Java extension java-eclipse-jdtls.

We are just Java in the extension marketplace

I was just trying diff different extensions

[tartarughina]

From the logs

{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: proto, No extension manifest found for extension proto"}
{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: scss, No extension manifest found for extension scss"}
{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: html, No extension manifest found for extension html"}
{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: kotlin, No extension manifest found for extension kotlin"}
{"level":3,"module_path":"extension_host::headless_host","file":"crates/extension_host/src/headless_host.rs","line":99,"message":"(remote server) failed to load extension: java, No extension manifest found for extension java"}

it looks like all of your extensions are failing. This is not a per extension issue but it looks more like an issue with Zed itself

[anshiq]

I uninstalled every LSP Extension in my zed editor.

{"level":3,"module_path":"language","file":"crates/language/src/language.rs","line":818,"message":"(remote server) found user-installed language server for json-language-server. path: \"/etc/profiles/per-user/nixos/bin/vscode-json-language-server\", arguments: [\"--stdio\"]"}
{"level":3,"module_path":"lsp","file":"crates/lsp/src/lsp.rs","line":430,"message":"(remote server) starting language server process. binary path: \"/etc/profiles/per-user/nixos/bin/vscode-json-language-server\", working directory: \"/mnt/c/Users/anshi/AppData/Roaming/Zed\", args: [\"--stdio\"]"}

It picks up json-language-server similar to gopls but why not java, kotlin, html, css and other mentioned,

{"level":3,"module_path":"fs::fs_watcher","file":"crates/fs/src/fs_watcher.rs","line":291,"message":"(remote server) Detected network/virtual filesystem (type 0x1021997) at /mnt/c/Users/anshi/AppData/Roaming/Zed/settings.json, using poll watcher"}
{"level":3,"module_path":"fs::fs_watcher","file":"crates/fs/src/fs_watcher.rs","line":220,"message":"(remote server) Using poll watcher (2000ms interval) for /mnt/c/Users/anshi/AppData/Roaming/Zed/settings.json"}

In logs Its on loading windows settings.json file not nixos's .config/zed/settings.json file, Could this issues be in Zed itself ?
another logs:

server-workspace-47.log

[tartarughina]

@anshiq Yes make sure that your server is using its specific settings.json.

It doesn't need to cover all settings you have on your principal machine but especially those settings that require a path should be updated.

[anshiq]

I should go to zed editor, repo right ?

[tartarughina]

@anshiq Yes open an issue over there, the problem is a layer above the Java or any other extension.