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FAQ#

❔ How do I troubleshoot "Server FOO-LS:pid exited with status signal. Do you want to restart it? (y or n)"?#

This message indicates that the language server has crashed for some reason. You may check the server stderr which is *FOO-LS::stderr*. If you get this try to run the exact command that lsp-mode is running in the terminal. You may find it in *lsp-log* buffer.


❔ How to configure a server with local variables?#

Add lsp server call to hack-local-variables-hook which runs right after the local variables are loaded.

(add-hook 'hack-local-variables-hook
          (lambda () (when (derived-mode-p 'XXX-mode) (lsp))))


❔ I have multiple language servers registered for language FOO. Which one will be used when opening a project?#

The one with highest priority wins. lsp-clients.el predefined servers have priority -1, lower than external packages (priority 0 if unspecified). If a server is registered with :add-on? flag set to t it will be started in parallel to the other servers that are registered for the current mode.


❔ I have multiple language servers for language FOO and I want to select the server per project, what can I do?#

You may create dir-local for each of the projects and specify list of lsp-enabled-clients. This will narrow the list of the clients that are going to be tested for the project.


❔ The completion does not work fine and inserts arguments and placeholders, what I am doing wrong?#

make sure you have installed yasnippet and you have yasnippet minor mode enabled.


❔ I am getting "Package ‘spinner-1.7.3’ is unavailable" when trying to install lsp-mode.#

This is caused by GPG keys used by the ELPA package manager not being up to date. You may fix by installing: gnu-elpa-keyring-update


❔ The flycheck does not work in typescript, html and javascript blocks in vue-mode. How to fix that?#

This is caused by the fact that vue-mode uses multiple major modes in single file and the lsp-ui checker may not associated with the major mode at point. You could fix that by adding the following lines to your config.

(with-eval-after-load 'lsp-mode
  (mapc #'lsp-flycheck-add-mode '(typescript-mode js-mode css-mode vue-html-mode)))


❔ I have disabled snippets and Rust Analyzer server inserts redundant $0 when performing completion?#

Rust Analyzer does not support disabling snippets - see https://github.com/rust-analyzer/rust-analyzer/issues/2518


❔ How do I force lsp-mode to forget the workspace folders for multi root#

servers so the workspace folders are added on demand?

Use the following snippet:

(advice-add 'lsp :before (lambda (&rest _args) (eval '(setf (lsp-session-server-id->folders (lsp-session)) (ht)))))


❔ When using clojure with clojure-lsp lsp-mode is interfering with typing (e. g. deleting whitespace while typing), how to fix that?#

The issue is caused by clojure-lsp server being more aggressive with formatting(deleting whitespaces) and aggressive-indent-mode being on and calling it while typing. The solution is either to disable aggressive-indent-mode or to disable lsp-mode formatting via lsp-enable-indentation.


❔ How do I disable automatic installation for particular language server?#

Solution: Disable for one client:

(with-eval-after-load 'lsp-bash
   (setf (lsp-client-download-server-fn (gethash 'bash-ls lsp-clients)) nil))
Disable for all clients:
(add-hook 'lsp-mode-hook
   (lambda () (mapc (lambda (client) (setf (lsp-client-download-server-fn client) nil))
                    (ht-values lsp-clients))))


Last update: October 13, 2021