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gemini-cli - 💡(How to fix) Fix Unhandled promise rejection [1 comments, 2 participants]

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google-gemini/gemini-cli#26391•Fetched 2026-05-03 04:52:09
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duncankmckinnonduncankmckinnon
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duncankmckinnonduncankmckinnongemini-cli[bot]gemini-cli[bot]
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Error Message

│ This is an unexpected error. Please file a bug report using the /bug tool. │ │ ✖ [ERROR] [IDEConnectionUtils] IDE fetch failed for http://127.0.0.1:56896/mcp TypeError: fetch failed █│ │ [cause]: HeadersTimeoutError: Headers Timeout Error █│

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What happened?

      at FastTimer.onParserTimeout [as _onTimeout] (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:181601:33)                      │

│ at Timeout.onTick [as _onTimeout] (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:174665:17) │ │ at listOnTimeout (node:internal/timers:605:17) │ │ at process.processTimers (node:internal/timers:541:7) { │ │ code: 'UND_ERR_HEADERS_TIMEOUT' │ │ } │ │ } │ │ ✖ ========================================= │ │ This is an unexpected error. Please file a bug report using the /bug tool. │ │ CRITICAL: Unhandled Promise Rejection! │ │ ========================================= │ │ Reason: TypeError: fetch failed │ │ Stack trace: │ │ TypeError: fetch failed │ │ at Object.processResponse (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:194285:20) │ │ at file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:194666:23 │ │ at node:internal/process/task_queues:150:7 │ │ at AsyncResource.runInAsyncScope (node:async_hooks:226:14) █│ │ at AsyncResource.runMicrotask (node:internal/process/task_queues:147:8) █│ │ ✖ [ERROR] [IDEConnectionUtils] IDE fetch failed for http://127.0.0.1:56896/mcp TypeError: fetch failed █│ │ at Object.processResponse (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:194285:20) █│ │ at file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:194666:23 { █│ │ [cause]: HeadersTimeoutError: Headers Timeout Error █│ │ at FastTimer.onParserTimeout [as _onTimeout] (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:181601:33) █│ │ at Timeout.onTick [as _onTimeout] (file:///opt/homebrew/lib/node_modules/@google/gemini-cli/bundle/chunk-UN6XCVMJ.js:174665:17) █│ │ at listOnTimeout (node:internal/timers:605:17) █│ │ at process.processTimers (node:internal/timers:541:7) { █│ │ code: 'UND_ERR_HEADERS_TIMEOUT' █│ │ } █│ │ }

What did you expect to happen?

Changes to file - approval stopped working

Client information

  • CLI Version: 0.40.1
  • Git Commit: 7a382e066
  • Session ID: 0740f40e-39ce-4340-93b8-640fb30b2107
  • Operating System: darwin v25.8.1
  • Sandbox Environment: no sandbox
  • Model Version: auto-gemini-3
  • Auth Type: oauth-personal
  • Memory Usage: 530.0 MB
  • Terminal Name: xterm.js(6.1.0-beta.197)
  • Terminal Background: #191a1b
  • Kitty Keyboard Protocol: Supported
  • IDE Client: VS Code

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Anything else we need to know?

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extent analysis

TL;DR

The issue is likely due to a headers timeout error, and increasing the timeout value or checking the network connection may resolve the problem.

Guidance

  • The error message UND_ERR_HEADERS_TIMEOUT suggests a timeout issue, which may be caused by a slow network connection or a server taking too long to respond.
  • Check the network connection and ensure it is stable to prevent timeouts.
  • Consider increasing the timeout value to allow more time for the server to respond, although the exact method to do this is not specified in the provided information.
  • The issue may be related to the fetch function failing, which could be due to various reasons such as network issues or server errors.

Notes

The provided information does not specify how to increase the timeout value or modify the fetch function, so further investigation into the @google/gemini-cli documentation or code may be necessary.

Recommendation

Apply workaround: Increase the timeout value or check the network connection, as the exact cause of the issue is not clear from the provided information.

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gemini-cli - 💡(How to fix) Fix Unhandled promise rejection [1 comments, 2 participants]