Ruby LSP memory leak

[ZombieHarvester]

Summary

Experiencing random memory leaks when using Ruby LSP last few weeks. It resolves after restart language server command.

I don't know how to reproduce it. I experience it from once in a few days. Seems there are no issues when using Solargraph.

LSP logs were lost after restart.

Initializing Ruby LSP v0.23.11 https://github.com/Shopify/ruby-lsp/releases/tag/v0.23.11....
Using formatter specified by user: standard
Using linters specified by user: standard, standard
Detected test library: rspec
Finished initializing Ruby LSP!
Activating Ruby LSP Rails add-on v0.4.0
Ruby LSP Rails booting server
Finished booting Ruby LSP Rails server

Zed logs somewhere around the memory leak

zed.log

Caused by:
    0: IO error: Broken pipe (os error 32)
    1: Broken pipe (os error 32)
2025-02-14T23:37:40.826077+04:00 [INFO] set status on client 79548: ConnectionLost
2025-02-14T23:37:54.44892+04:00 [INFO] attempting to start language server "yaml-language-server", path: "/Users/user/Documents/dev/app", id: 10
2025-02-14T23:38:51.732887+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:38:51.989528+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:38:55.125531+04:00 [INFO] fetching latest version of language server "yaml-language-server"
2025-02-14T23:38:59.555664+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:38:59.556263+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:39:02.912805+04:00 [ERROR] cannot read LSP message headers
2025-02-14T23:39:02.944088+04:00 [WARN] Get code actions via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:02.944444+04:00 [WARN] Get code actions via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:02.944791+04:00 [WARN] Get document highlights via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:02.945167+04:00 [WARN] Get document highlights via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:02.976899+04:00 [ERROR] Get code actions via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:02.977399+04:00 [ERROR] Get code actions via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:03.028582+04:00 [ERROR] Get document highlights via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:03.028809+04:00 [ERROR] Get document highlights via ruby-lsp failed: oneshot canceled
2025-02-14T23:39:03.24287+04:00 [INFO] set status on client 79548: ConnectionError
2025-02-14T23:39:03.24346+04:00 [ERROR] failed to connect error sending request for url (https://zed.dev/rpc)
2025-02-14T23:39:03.244296+04:00 [INFO] set status on client 79548: ReconnectionError { next_reconnection: Instant { tv_sec: 1238635, tv_nsec: 92035341 } }
2025-02-14T23:39:03.808946+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:39:03.809187+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:39:13.82891+04:00 [INFO] set status on client 79548: ConnectionError
2025-02-14T23:39:13.829269+04:00 [ERROR] failed to connect error sending request for url (https://zed.dev/rpc)
2025-02-14T23:39:13.829641+04:00 [INFO] set status on client 79548: ReconnectionError { next_reconnection: Instant { tv_sec: 1238645, tv_nsec: 841144117 } }
2025-02-14T23:39:14.593174+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:39:14.593414+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:39:24.609316+04:00 [INFO] set status on client 79548: ConnectionError
2025-02-14T23:39:24.609651+04:00 [ERROR] failed to connect error sending request for url (https://zed.dev/rpc)
2025-02-14T23:39:24.609893+04:00 [INFO] set status on client 79548: ReconnectionError { next_reconnection: Instant { tv_sec: 1238657, tv_nsec: 411765953 } }
2025-02-14T23:39:26.108927+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:39:26.109205+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:39:36.11124+04:00 [INFO] set status on client 79548: ConnectionError
2025-02-14T23:39:36.111453+04:00 [ERROR] failed to connect error sending request for url (https://zed.dev/rpc)
2025-02-14T23:39:36.111625+04:00 [INFO] set status on client 79548: ReconnectionError { next_reconnection: Instant { tv_sec: 1238669, tv_nsec: 708451893 } }
2025-02-14T23:39:38.362927+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:39:38.363143+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:39:48.365028+04:00 [INFO] set status on client 79548: ConnectionError
2025-02-14T23:39:48.365249+04:00 [ERROR] failed to connect error sending request for url (https://zed.dev/rpc)
2025-02-14T23:39:48.365422+04:00 [INFO] set status on client 79548: ReconnectionError { next_reconnection: Instant { tv_sec: 1238684, tv_nsec: 4141078 } }
2025-02-14T23:40:02.773828+04:00 [INFO] set status on client 79548: Reauthenticating
2025-02-14T23:40:02.774175+04:00 [INFO] set status on client 79548: Reconnecting
2025-02-14T23:40:03.253601+04:00 [INFO] connected to rpc endpoint https://collab.zed.dev/rpc
2025-02-14T23:40:03.867677+04:00 [INFO] add_connection;
2025-02-14T23:40:03.879436+04:00 [INFO] set status on client 79548: Connected { peer_id: PeerId { owner_id: 679, id: 2001732 }, connection_id: ConnectionId { owner_id: 0, id: 2 } }
2025-02-14T23:40:04.526465+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:40:04.526648+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:40:04.932508+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:40:04.93269+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:40:05.127767+04:00 [INFO] language server "yaml-language-server" is already installed
2025-02-14T23:40:05.128799+04:00 [INFO] starting language server process. binary path: "/Users/user/Library/Application Support/Zed/node/node-v22.5.1-darwin-x64/bin/node", working directory: "/Users/user/Documents/dev/app", args: ["/Users/user/Library/Application Support/Zed/languages/yaml-language-server/node_modules/yaml-language-server/bin/yaml-language-server", "--stdio"]
2025-02-14T23:40:27.140688+04:00 [WARN] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:27.140923+04:00 [ERROR] Broken pipe (os error 32)
2025-02-14T23:40:27.342704+04:00 [ERROR] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:27.367392+04:00 [WARN] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:27.367606+04:00 [ERROR] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:27.758884+04:00 [WARN] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:27.791354+04:00 [ERROR] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:28.054204+04:00 [WARN] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:28.054402+04:00 [ERROR] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:31.225088+04:00 [WARN] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:31.256592+04:00 [ERROR] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:31.391724+04:00 [WARN] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:31.392+04:00 [ERROR] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:52.273595+04:00 [WARN] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:52.392783+04:00 [WARN] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:52.423431+04:00 [ERROR] Get document highlights via ruby-lsp failed: server shut down
2025-02-14T23:40:52.562897+04:00 [WARN] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:40:52.563159+04:00 [ERROR] Get code actions via ruby-lsp failed: server shut down
2025-02-14T23:41:04.137878+04:00 [INFO] stopping language server ruby-lsp
2025-02-14T23:41:04.153716+04:00 [INFO] stopping language server tailwindcss-language-server
2025-02-14T23:41:04.159217+04:00 [INFO] stopping language server snippet-completion-server
2025-02-14T23:41:04.184985+04:00 [ERROR] server shut down
2025-02-14T23:41:04.190777+04:00 [ERROR] oneshot canceled
2025-02-14T23:41:04.211571+04:00 [ERROR] oneshot canceled
2025-02-14T23:41:04.549133+04:00 [INFO] attempting to start language server "ruby-lsp", path: "/Users/user/Documents/dev/app", id: 11
2025-02-14T23:41:04.549388+04:00 [INFO] attempting to start language server "tailwindcss-language-server", path: "/Users/user/Documents/dev/app", id: 12
2025-02-14T23:41:04.567279+04:00 [INFO] fetching latest version of language server "tailwindcss-language-server"
2025-02-14T23:41:04.596711+04:00 [INFO] starting language server process. binary path: "/Users/user/.asdf/shims/ruby-lsp", working directory: "/Users/user/Documents/dev/app", args: []
2025-02-14T23:41:05.1245+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:41:05.124754+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:41:08.823884+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:41:08.824147+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:41:09.674539+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-14T23:41:09.675038+04:00 [INFO] Node runtime install_if_needed
2025-02-14T23:41:10.179419+04:00 [INFO] language server "tailwindcss-language-server" is already installed
2025-02-14T23:41:10.191584+04:00 [INFO] starting language server process. binary path: "/Users/user/Library/Application Support/Zed/node/node-v22.5.1-darwin-x64/bin/node", working directory: "/Users/user/Documents/dev/app", args: ["/Users/user/Library/Application Support/Zed/languages/tailwindcss-language-server/node_modules/.bin/tailwindcss-language-server", "--stdio"]
2025-02-14T23:41:13.495587+04:00 [INFO] Language server with id 12 sent unhandled notification @/tailwindCSS/projectInitialized:
[
  null
]
2025-02-14T23:41:13.49619+04:00 [WARN] unhandled capability registration: Registration { id: "0dba4b2a-52e9-46f9-a53d-7ac5a254eba3", method: "workspace/didChangeWorkspaceFolders", register_options: Some(Object {}) }

Zed Version and System Specs

Zed: v0.173.9 (Zed)
OS: macOS 12.7.6
Memory: 16 GiB
Architecture: x86_64

[ZombieHarvester]

Just happened again. Seems it always is accompanied by or triggered by Finding references

Nothing in the Ruby LSP logs

Initializing Ruby LSP v0.23.11 https://github.com/Shopify/ruby-lsp/releases/tag/v0.23.11....
Using formatter specified by user: standard
Using linters specified by user: standard, standard
Detected test library: rspec
Finished initializing Ruby LSP!
Activating Ruby LSP Rails add-on v0.4.0
Ruby LSP Rails booting server
Finished booting Ruby LSP Rails server

Zed logs from launching Zed to Ruby taking 60gb of memory 10-15 minutes later. Again solved by restart language server

zed.log

2025-02-17T21:02:50.821471+04:00 [INFO] ========== starting zed ==========
2025-02-17T21:02:50.857364+04:00 [INFO] Opening main db
2025-02-17T21:02:50.863072+04:00 [INFO] Opening main db
2025-02-17T21:02:50.89256+04:00 [INFO] Using git binary path: Some("/Applications/Zed.app/Contents/MacOS/git")
2025-02-17T21:02:51.069928+04:00 [INFO] Prompt template overrides directory found at /Users/user/.config/zed/prompt_overrides.
2025-02-17T21:02:51.074561+04:00 [INFO] extensions updated. loading 13, reloading 0, unloading 0
2025-02-17T21:02:51.154148+04:00 [INFO] Opening main db
2025-02-17T21:02:51.292405+04:00 [INFO] set status on client 0: Authenticating
2025-02-17T21:02:51.427734+04:00 [INFO] set status on client 79548: Connecting
2025-02-17T21:02:51.469743+04:00 [INFO] Opening main db
2025-02-17T21:02:51.530285+04:00 [INFO] Opening main db
2025-02-17T21:02:51.730393+04:00 [INFO] connected to rpc endpoint https://collab.zed.dev/rpc
2025-02-17T21:02:52.222957+04:00 [INFO] add_connection;
2025-02-17T21:02:52.240001+04:00 [INFO] set status on client 79548: Connected { peer_id: PeerId { owner_id: 679, id: 5245266 }, connection_id: ConnectionId { owner_id: 0, id: 0 } }
2025-02-17T21:02:55.963305+04:00 [INFO] set environment variables from shell:/bin/zsh, path:/Users/user/.asdf/shims:/usr/local/opt/asdf/libexec/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
2025-02-17T21:02:57.090224+04:00 [INFO] building git repository, `.git` path in the worktree: ".git"
2025-02-17T21:02:57.297164+04:00 [INFO] attempting to start language server "tailwindcss-language-server", path: "/Users/user/Documents/dev/app", id: 1
2025-02-17T21:02:57.297945+04:00 [INFO] attempting to start language server "ruby-lsp", path: "/Users/user/Documents/dev/app", id: 2
2025-02-17T21:02:57.298417+04:00 [INFO] attempting to start language server "snippet-completion-server", path: "/Users/user/Documents/dev/app", id: 3
2025-02-17T21:03:01.858545+04:00 [INFO] using project environment variables shell launched in "/Users/user/Documents/dev/app". PATH="/Users/user/.asdf/shims:/usr/local/opt/asdf/libexec/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin"
2025-02-17T21:03:01.858958+04:00 [INFO] fetching latest version of language server "tailwindcss-language-server"
2025-02-17T21:03:01.869238+04:00 [INFO] starting language server process. binary path: "/Users/user/.asdf/shims/ruby-lsp", working directory: "/Users/user/Documents/dev/app", args: []
2025-02-17T21:03:02.390337+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-17T21:03:02.390526+04:00 [INFO] Node runtime install_if_needed
2025-02-17T21:03:02.481638+04:00 [INFO] starting language server process. binary path: "/Users/user/Library/Application Support/Zed/extensions/work/snippets/simple-completion-language-server-v0.1.1/simple-completion-language-server", working directory: "/Users/user/Documents/dev/app", args: []
2025-02-17T21:03:04.961843+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-17T21:03:04.962038+04:00 [INFO] Node runtime install_if_needed
2025-02-17T21:03:05.494863+04:00 [ERROR] failed to execute npm root subcommand:
stdout: ""
stderr: "unknown command: npm. Perhaps you have to reshim?\n"
2025-02-17T21:03:05.495095+04:00 [INFO] Node runtime install_if_needed
2025-02-17T21:03:05.855805+04:00 [INFO] language server "tailwindcss-language-server" is already installed
2025-02-17T21:03:05.872907+04:00 [INFO] starting language server process. binary path: "/Users/user/Library/Application Support/Zed/node/node-v22.5.1-darwin-x64/bin/node", working directory: "/Users/user/Documents/dev/app", args: ["/Users/user/Library/Application Support/Zed/languages/tailwindcss-language-server/node_modules/.bin/tailwindcss-language-server", "--stdio"]
2025-02-17T21:03:07.876936+04:00 [INFO] Language server with id 1 sent unhandled notification @/tailwindCSS/projectInitialized:
[
  null
]
2025-02-17T21:03:07.877224+04:00 [WARN] unhandled capability registration: Registration { id: "57fb6971-6cd4-4171-9d79-c150e6cfa40d", method: "workspace/didChangeWorkspaceFolders", register_options: Some(Object {}) }
2025-02-17T21:03:31.616523+04:00 [ERROR] Watcher pattern `"**/*.rb"` has not been attached to any worktree or absolute path
2025-02-17T21:03:31.621895+04:00 [ERROR] Watcher pattern `{"baseUri":"file:///Users/user/Documents/dev/app","pattern":"{.rubocop.yml,.rubocop}"}` has not been attached to any worktree or absolute path
2025-02-17T21:03:31.622069+04:00 [ERROR] Watcher pattern `"**/*.rb"` has not been attached to any worktree or absolute path
2025-02-17T21:06:13.473705+04:00 [WARN] timed out waiting for formatting
2025-02-17T21:06:40.255663+04:00 [WARN] timed out waiting for formatting
2025-02-17T21:06:42.020503+04:00 [INFO] open paths ["/Users/user/Documents/dev/app/spec/models/subscription_payment_spec.rb"]
2025-02-17T21:07:55.290362+04:00 [ERROR] Cancelled LSP request task for "textDocument/references" id 71 which took over 120s
2025-02-17T21:07:55.296137+04:00 [WARN] Find all references via ruby-lsp failed: LSP request timeout
2025-02-17T21:07:55.355643+04:00 [ERROR] Find all references via ruby-lsp failed: LSP request timeout

[notpeter]

I'm assume this is likely an upstream ruby-lsp issue and not something that zed really has control over. If you have steps to trigger this behavior (e.g. on an open source repo) I would love to dig in further, but without that there's not much we can do.

It might be worth trying older versions of ruby-lsp in case there is a regression there:

• https://github.com/Shopify/ruby-lsp/releases

I'm not best sure how to instrument ruby-lsp, I would recommend you file an issue upstream perhaps they can be of help.

Sorry!