EXTENSION HOST unable to install extensions

Is there an existing issue for this bug?

• I have searched the existing open issues and found none that apply.
• If I find any issue of interest that is related or closed, I will included a link to it in this issue.

Required Troubleshooting Steps

• I have read and performed the troubleshooting steps
• I have tried both values of the remote.SSH.useLocalServer setting
• My issue was not covered in the Tips and Tricks linked from the Troubleshooting Wiki.
• I will include a complete copy of my Remote - SSH logs by running Remote-SSH: Show Log in the command palette or from View > Output in the menu bar

[Optional] Diagnose with Copilot

I did not ask the @remote-ssh participant for help

In step 2 of the troubleshooting wiki, what was the result of running the generated SSH command verbatim outside of VS Code?

I did not try step 2 of the troubleshooting steps

Remote-SSH Log

> Connected to SSH Host - Please do not close this terminal
[11:56:35.139] Spawned SSH tunnel between local port 53449 and remote target socket /tmp/code-2f75416c-395a-4d84-abf1-883a75b41d19
[11:56:35.140] Waiting for ssh tunnel to be ready
[11:56:35.141] Tunneled socket /tmp/code-2f75416c-395a-4d84-abf1-883a75b41d19 to local port 53449
[11:56:35.141] Resolved "ssh-remote+10.32.170.14" to "port 53449"
[11:56:35.148] Initizing new exec server for ssh-remote+10.32.170.14
[11:56:35.148] Resolving exec server at port 53449
[11:56:35.525] Exec server for ssh-remote+10.32.170.14 created and cached
[11:56:35.525] Extensions to install: 
[11:56:35.530] ------




[11:56:35.531] No hints found in the recent session.
[11:56:35.662] [server] Checking /home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/log.txt and /home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/pid.txt for a running server...
[11:56:35.662] [server] Found running server (pid=1389565)
[11:56:38.439] Opening exec server for ssh-remote+10.32.170.14
[11:56:38.610] Verified and reusing cached exec server for ssh-remote+10.32.170.14
[11:56:38.610] No hints found in the recent session.
[11:56:38.732] Opening exec server for ssh-remote+10.32.170.14
[11:56:38.857] Verified and reusing cached exec server for ssh-remote+10.32.170.14
[11:56:38.857] No hints found in the recent session.

Pty Host (REMOTE):

2025-03-21 14:43:41.947 [info] Extension host agent started.
2025-03-21 14:43:42.265 [info] [<unknown>][cbd230a1][ManagementConnection] New connection established.
2025-03-21 14:43:42.268 [info] [<unknown>][d4a26e43][ExtensionHostConnection] New connection established.
2025-03-21 14:43:43.014 [info] [<unknown>][d4a26e43][ExtensionHostConnection] <1389693> Launched Extension Host Process.
2025-03-21 14:43:53.370 [info] Downloaded extension to file:///home/gabriel/.vscode-server/data/CachedExtensionVSIXs/a790bfec-9815-40d5-99e5-0e35747f0a1d
2025-03-21 14:43:53.414 [info] Installing extension: ms-python.isort {"isApplicationScoped":false,"profileLocation":{"$mid":1,"fsPath":"/home/gabriel/.vscode-server/extensions/extensions.json","external":"file:///home/gabriel/.vscode-server/extensions/extensions.json","path":"/home/gabriel/.vscode-server/extensions/extensions.json","scheme":"file"},"productVersion":{"version":"1.98.2","date":"2025-03-12T13:32:45.399Z"}}
2025-03-21 14:48:41.949 [info] New EH opened, aborting shutdown
2025-03-21 14:48:57.878 [info] [<unknown>][cbd230a1][ManagementConnection] The client has disconnected gracefully, so the connection will be disposed.
2025-03-21 14:48:57.942 [info] [<unknown>][d4a26e43][ExtensionHostConnection] <1389693> Extension Host Process exited with code: 0, signal: null.
2025-03-21 14:48:57.943 [info] Last EH closed, waiting before shutting down
2025-03-21 14:49:04.626 [info] [<unknown>][997ce47a][ExtensionHostConnection] New connection established.
2025-03-21 14:49:04.627 [info] [<unknown>][94f40541][ManagementConnection] New connection established.
2025-03-21 14:49:04.635 [info] [<unknown>][997ce47a][ExtensionHostConnection] <1391503> Launched Extension Host Process.
2025-03-21 14:49:08.225 [error] CodeExpectedError: Could not find pty 11 on pty host
    at I.W (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:12275)
    at I.updateIcon (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:7772)
    at O.s.<computed> (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:2962)
    at Object.call (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:28:4204)
    at el.s (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80918)
    at el.q (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80441)
    at ds.value (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:79843)
    at x.B (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2373)
    at x.fire (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2591)
    at process.C (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:24:29877)
    at process.emit (node:events:518:28)
    at emit (node:internal/child_process:950:14)
    at process.processTicksAndRejections (node:internal/process/task_queues:83:21)
2025-03-21 14:49:19.225 [info] [<unknown>][94f40541][ManagementConnection] The client has disconnected gracefully, so the connection will be disposed.
2025-03-21 14:49:19.278 [info] [<unknown>][997ce47a][ExtensionHostConnection] <1391503> Extension Host Process exited with code: 0, signal: null.
2025-03-21 14:49:19.278 [info] Cancelling previous shutdown timeout
2025-03-21 14:49:19.278 [info] Last EH closed, waiting before shutting down
2025-03-21 14:49:28.196 [info] [<unknown>][823438b5][ManagementConnection] New connection established.
2025-03-21 14:49:28.198 [info] [<unknown>][38b3df43][ExtensionHostConnection] New connection established.
2025-03-21 14:49:28.206 [info] [<unknown>][38b3df43][ExtensionHostConnection] <1392049> Launched Extension Host Process.
2025-03-21 14:49:31.818 [error] CodeExpectedError: Could not find pty 17 on pty host
    at I.W (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:12275)
    at I.updateIcon (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:7772)
    at O.s.<computed> (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:2962)
    at Object.call (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:28:4204)
    at el.s (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80918)
    at el.q (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80441)
    at ds.value (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:79843)
    at x.B (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2373)
    at x.fire (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2591)
    at process.C (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:24:29877)
    at process.emit (node:events:518:28)
    at emit (node:internal/child_process:950:14)
    at process.processTicksAndRejections (node:internal/process/task_queues:83:21)
2025-03-21 14:49:31.822 [error] CodeExpectedError: Could not find pty 17 on pty host
    at I.W (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:12275)
    at I.updateTitle (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:7722)
    at O.s.<computed> (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:45:2962)
    at Object.call (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:28:4204)
    at el.s (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80918)
    at el.q (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:80441)
    at ds.value (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:79843)
    at x.B (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2373)
    at x.fire (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:26:2591)
    at process.C (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/vs/platform/terminal/node/ptyHostMain.js:24:29877)
    at process.emit (node:events:518:28)
    at emit (node:internal/child_process:950:14)
    at process.processTicksAndRejections (node:internal/process/task_queues:83:21)
2025-03-21 14:50:23.195 [info] Downloaded extension to file:///home/gabriel/.vscode-server/data/CachedExtensionVSIXs/a773acee-f96f-4afd-9314-290f1676628f
2025-03-21 14:50:23.202 [error] Error: Unexpected SIGPIPE
    at process.<anonymous> (file:///home/gabriel/.vscode-server/cli/servers/Stable-ddc367ed5c8936efe395cffeec279b04ffd7db78/server/out/server-main.js:183:1060)
    at process.emit (node:events:530:35)
2025-03-21 14:50:23.232 [info] Installing extension: ms-python.autopep8 {"isApplicationScoped":false,"profileLocation":{"$mid":1,"fsPath":"/home/gabriel/.vscode-server/extensions/extensions.json","external":"file:///home/gabriel/.vscode-server/extensions/extensions.json","path":"/home/gabriel/.vscode-server/extensions/extensions.json","scheme":"file"},"productVersion":{"version":"1.98.2","date":"2025-03-12T13:32:45.399Z"}}
2025-03-21 14:51:37.529 [info] [<unknown>][823438b5][ManagementConnection] The client has disconnected gracefully, so the connection will be disposed.
2025-03-21 14:51:37.587 [info] [<unknown>][38b3df43][ExtensionHostConnection] <1392049> Extension Host Process exited with code: 0, signal: null.
2025-03-21 14:51:37.588 [info] Cancelling previous shutdown timeout
2025-03-21 14:51:37.588 [info] Last EH closed, waiting before shutting down

Extensions Host (REMOTE)

2025-03-21 14:56:57.237 [info] Extension host with pid 1393995 started
2025-03-21 14:56:57.237 [error] Error: EEXIST: file already exists, open '/home/gabriel/.vscode-server/data/User/workspaceStorage/a0b10732ab743f6229b002035ee68dee/vscode.lock'
2025-03-21 14:56:57.240 [info] Lock '/home/gabriel/.vscode-server/data/User/workspaceStorage/a0b10732ab743f6229b002035ee68dee/vscode.lock': Could not acquire lock, checking if the file is stale.
2025-03-21 14:56:57.244 [info] Lock '/home/gabriel/.vscode-server/data/User/workspaceStorage/a0b10732ab743f6229b002035ee68dee/vscode.lock': The lock does not look stale, elapsed: 518 ms, giving up.
2025-03-21 14:56:57.252 [info] Lock '/home/gabriel/.vscode-server/data/User/workspaceStorage/a0b10732ab743f6229b002035ee68dee-1/vscode.lock': Lock acquired.
2025-03-21 14:56:57.467 [info] ExtensionService#_doActivateExtension vscode.emmet, startup: false, activationEvent: 'onLanguage'
2025-03-21 14:56:57.468 [info] ExtensionService#_doActivateExtension vscode.configuration-editing, startup: false, activationEvent: 'onLanguage:jsonc'
2025-03-21 14:56:57.469 [info] ExtensionService#_doActivateExtension vscode.json-language-features, startup: false, activationEvent: 'onLanguage:jsonc'
2025-03-21 14:56:57.469 [info] ExtensionService#_doActivateExtension vscode.typescript-language-features, startup: false, activationEvent: 'onLanguage:jsonc'
2025-03-21 14:56:57.627 [info] ExtensionService#_doActivateExtension vscode.git-base, startup: false, activationEvent: '*', root cause: vscode.git
2025-03-21 14:56:57.961 [info] ExtensionService#_doActivateExtension vscode.git, startup: false, activationEvent: '*'
2025-03-21 14:56:57.961 [info] ExtensionService#_doActivateExtension vscode.github, startup: false, activationEvent: '*'
2025-03-21 14:56:58.230 [info] Eager extensions activated
2025-03-21 14:56:58.230 [info] ExtensionService#_doActivateExtension vscode.debug-auto-launch, startup: false, activationEvent: 'onStartupFinished'
2025-03-21 14:56:58.231 [info] ExtensionService#_doActivateExtension vscode.merge-conflict, startup: false, activationEvent: 'onStartupFinished'
2025-03-21 15:11:27.857 [warning] vscode.json-language-features - Code actions of kind 'source.fixAll' requested but returned code action is of kind 'source.sort.json'. Code action will be dropped. Please check 'CodeActionContext.only' to only return requested code actions.
2025-03-21 15:11:27.979 [warning] vscode.json-language-features - Code actions of kind 'source.organizeImports' requested but returned code action is of kind 'source.sort.json'. Code action will be dropped. Please check 'CodeActionContext.only' to only return requested code actions.

Expected Behavior

Extensions should be installed correctly and should shou up in the Extension List (SSH: x.x.x.x - INSTALLED) section.

Actual Behavior

Extension List (SSH: x.x.x.x - INSTALLED) section is empty, even for known installed extensions.
I can confirm that 3 extensions are installed but do not show up.

code --list-extensions --show-versions
Extensions installed on SSH: 10.32.170.14:
ms-python.debugpy@2025.4.1
ms-python.python@2025.2.0
ms-python.vscode-pylance@2025.3.2

When I am trying to install autopep8/ isort, they load forever and nothing happens.

Steps To Reproduce

Remote: Linux
Host: Windows 11

Latest version for remote extension, vscode, etc

config:

    "remote.SSH.remoteServerListenOnSocket": true,
    "remote.SSH.useCurlAndWgetConfigurationFiles": true,
    "remote.SSH.localServerDownload": "always",
    "remote.downloadExtensionsLocally": true,

Anything else?

No response

Start by reproducing Remote-SSH extension installation with the supplied Remote-SSH and Pty Host logs, focusing on the extension host and pty errors. Done means extensions install successfully on the remote host without the reported installation failure.