Github copilot completions report temporary issues

[cocopilotaa]

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Copilot Feature Area

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output:

2025-12-05 15:30:55.478 [info] Can't use the Electron fetcher in this environment.
2025-12-05 15:30:55.478 [info] Using the Node fetch fetcher.
2025-12-05 15:30:56.901 [info] Got Copilot token for cocopilotaa
2025-12-05 15:30:56.901 [info] Copilot Chat: 0.33.2, VS Code: 1.106.3
2025-12-05 15:31:08.079 [info] activationBlocker from 'languageModelAccess' took for 12810ms
2025-12-05 15:31:09.832 [info] copilot token chat_enabled: true, sku: free_limited_copilot
2025-12-05 15:31:09.833 [info] GitHub.vscode-pull-request-github extension is not yet activated.
2025-12-05 15:31:09.853 [info] Registering default platform agent...
2025-12-05 15:31:09.855 [info] [code-referencing] Public code references are enabled.
2025-12-05 15:31:09.855 [info] activationBlocker from 'conversationFeature' took for 14592ms
2025-12-05 15:31:09.878 [info] [fetchCompletions] Request b33f13ef-f6ea-4e20-9950-762dbf8e12c0 at <https://proxy.individual.githubcopilot.com/v1/engines/gpt-4o-copilot/completions> rejected with TypeError: fetch failed after 353.9990539999999ms
2025-12-05 15:31:09.885 [error] [ghostText] Error on ghost text request: [TypeError: fetch failed
	at node:internal/deps/undici/undici:13510:13
	at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
	at async b3._fetch (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4418:24712)
	at async pSn (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4418:27435)
	at async Fx.fetch (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4418:29864)
	at async qj.fetchWithParameters (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:1937:8599)
	at async qj.fetchAndStreamCompletions (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:1937:7173)
	at async zcn (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:2147:488)] {
  [cause]: [Error: read ECONNRESET
  	at TLSWrap.onStreamRead (node:internal/stream_base_commons:216:20)] {
    errno: -104,
    code: 'ECONNRESET',
    syscall: 'read'
  }
}

diagnostics:

## GitHub Copilot Chat

- Extension: 0.33.2 (prod)
- VS Code: 1.106.3 (bf9252a2fb45be6893dd8870c0bf37e2e1766d61)
- OS: linux 4.18.0-553.47.1.el8_10.x86_64 x64
- Remote Name: ssh-remote
- Extension Kind: Workspace
- GitHub Account: cocopilotaa

## Network

User Settings:
```json
  "http.proxySupport": "off",
  "http.electronFetch": true,
  "http.fetchAdditionalSupport": false,
  "github.copilot.advanced.debug.useElectronFetcher": true,
  "github.copilot.advanced.debug.useNodeFetcher": false,
  "github.copilot.advanced.debug.useNodeFetchFetcher": true

Connecting to https://api.github.com:

• DNS ipv4 Lookup: 20.205.243.168 (17 ms)
• DNS ipv6 Lookup: Error (17 ms): getaddrinfo ENOTFOUND api.github.com
• Proxy URL: None (1 ms)
• Electron fetch: Unavailable
• Node.js https: HTTP 200 (353 ms)
• Node.js fetch (configured): HTTP 200 (293 ms)

Connecting to https://api.individual.githubcopilot.com/_ping:

• DNS ipv4 Lookup: 140.82.113.22 (17 ms)
• DNS ipv6 Lookup: Error (17 ms): getaddrinfo ENOTFOUND api.individual.githubcopilot.com
• Proxy URL: None (0 ms)
• Electron fetch: Unavailable
• Node.js https: HTTP 200 (864 ms)
• Node.js fetch (configured): HTTP 200 (829 ms)

Connecting to https://proxy.individual.githubcopilot.com/_ping:

• DNS ipv4 Lookup: 4.249.131.160 (17 ms)
• DNS ipv6 Lookup: Error (17 ms): getaddrinfo ENOTFOUND proxy.individual.githubcopilot.com
• Proxy URL: None (1 ms)
• Electron fetch: Unavailable
• Node.js https: Error (249 ms): Error: read ECONNRESET
  at TLSWrap.onStreamRead (node:internal/stream_base_commons:216:20)
• Node.js fetch (configured): Error (236 ms): TypeError: fetch failed
  at node:internal/deps/undici/undici:13510:13
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  at async b3._fetch (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4418:24712)
  at async /home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4450:190
  at async Zy.h (file:///home/wjb/.vscode-server/cli/servers/Stable-bf9252a2fb45be6893dd8870c0bf37e2e1766d61/server/out/vs/workbench/api/node/extensionHostProcess.js:114:41645)
  at async RG.handleItemSelection (/home/wjb/.vscode-server/extensions/github.copilot-chat-0.33.2/dist/extension.js:4043:7909)
  Error: read ECONNRESET
  at TLSWrap.onStreamRead (node:internal/stream_base_commons:216:20)

Connecting to https://github.com: HTTP 200 (275 ms)
Connecting to https://telemetry.individual.githubcopilot.com/_ping: Error (296 ms): Error: read ECONNRESET
at TLSWrap.onStreamRead (node:internal/stream_base_commons:216:20)

Number of system certificates: 147

Documentation

In corporate networks: Troubleshooting firewall settings for GitHub Copilot.

[anirudh-svg]

Thanks for providing the full diagnostics output — this helps narrow down the issue.

Based on the logs, this does not appear to be a Copilot bug. Instead, your VS Code remote environment is failing to reach one specific Copilot endpoint:

https://proxy.individual.githubcopilot.com/_ping

All other GitHub and Copilot endpoints return HTTP 200, but this one fails with:

read ECONNRESET
TypeError: fetch failed

This strongly suggests a network-level interruption rather than an issue with VS Code or the Copilot extension.

What’s Actually Happening

The failures indicate:

Your environment is using Node fetch instead of Electron fetch (Electron fetcher not available).

Requests to the main Copilot API domain succeed.

Requests to the proxy endpoint are being force-closed (ECONNRESET) — typically caused by:

A firewall or DPI system blocking the domain

A corporate / cloud server policy

A network proxy dropping TLS connections

SSH-remote server restrictions

Missing or outdated CA certificates

This is also consistent with the log showing:

Remote Name: ssh-remote
OS: Linux (server)

If the server blocks outbound AI endpoints, Copilot completions won’t load.

Recommended Fixes

1. Verify outbound access to Copilot proxy domain

Try running this on the remote server:

curl -v https://proxy.individual.githubcopilot.com/_ping

If it fails, the issue is at the network/firewall level.

You may need to whitelist these endpoints:

*.githubcopilot.com
api.github.com
api.individual.githubcopilot.com
proxy.individual.githubcopilot.com
telemetry.individual.githubcopilot.com

2. Check if your SSH remote environment blocks Node TLS

Some enterprise Linux distros block Node.js outgoing TLS by default.

To test:

node -e "require('https').get('https://proxy.individual.githubcopilot.com/_ping', r => console.log(r.statusCode)).on('error', console.error)"

3. Update CA certificates

Run:

sudo update-ca-trust
sudo update-ca-certificates || true

4. Disable the forced fetcher overrides (recommended)

Your settings explicitly force Copilot to use a specific fetcher:

"github.copilot.advanced.debug.useElectronFetcher": true,
"github.copilot.advanced.debug.useNodeFetcher": false,
"github.copilot.advanced.debug.useNodeFetchFetcher": true

Remove all of these so Copilot can auto-select the correct method:

"github.copilot.advanced.debug.useElectronFetcher": false,
"github.copilot.advanced.debug.useNodeFetcher": false,
"github.copilot.advanced.debug.useNodeFetchFetcher": false

Or simply delete them.

5. If on a corporate / university network

Your logs show symptoms identical to MITM firewalls terminating AI-related traffic.

GitHub provides guidance here:
https://docs.github.com/en/copilot/troubleshooting/troubleshooting-firewall-settings-for-github-copilot