[CI Failure Doctor] CI Failure Investigation - Run #34603

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🏥 CI Failure Investigation - Run #34603

Summary

Every job in the CI workflow aborted while GitHub returned a 500 Internal Server Error during the initial git fetch, so none of the downstream steps executed.

Failure Details

• Run: 21833671745
• Commit: d4477ec
• Trigger: push

Root Cause Analysis

Repeated calls to git fetch --depth=1 origin +d4477ecdf92f2dc308f537da3bb2ea54ca9c806e:refs/remotes/origin/main hit GitHub infrastructure that returned remote: Internal Server Error followed by fatal: unable to access 'https://github.com/github/gh-aw/': The requested URL returned error: 500. Every job retries the fetch once or twice and stops there, so none of the steps run.

Failed Jobs and Errors

• update, build, bench, actions-build, Build & Test on macos-latest, Alpine Container Test, lint-js, audit, fuzz, Security Scan: zizmor, mcp-server-compile-test, Security Scan: poutine (all failed before setup steps due to the same git fetch 500)
• Integration jobs (Workflow Misc Part 1/2, Workflow Validation, Workflow Permissions, CLI Audit & Inspect, CLI MCP Gateway, CLI Completion & Other, CLI Progress Flag) also terminated immediately after repeating the git fetch that hit the same 500 error

Investigation Findings

• The first failure occurs around 2026-02-09T17:04:55Z in the update job log once the runner retries the git fetch after waiting.
• Every job stops with fatal: unable to access 'https://github.com/github/gh-aw/': The requested URL returned error: 500 before any compiler, lint, or test step starts.
• There is no indication of repository corruption or missing files; the fetch randomized GitHub endpoints that serve the repo and responded with an HTTP 500 for all attempts in this run.

Recommended Actions

• Rerun the CI workflow now that GitHub infrastructure may be recovered (the fetch 500 should disappear once the github.com endpoints stop returning 500). Monitor logs to confirm the same job no longer sees remote: Internal Server Error.
• If the git fetch 500 persists across repeated reruns, escalate to GitHub infrastructure (Internal Tools) referencing run 21833671745 so they can inspect why the repository endpoint was returning HTTP 500.

Prevention Strategies

• Treat repeated git fetch HTTP 500s as upstream infrastructure issues; gate them by checking (www.githubstatus.com/redacted) before rerunning or by providing an automated retry path that waits longer before failing the job.
• Consider alerting on the exact fatal: unable to access 'https://github.com/github/gh-aw/': The requested URL returned error: 500 string so we can automatically pause the run and avoid running the whole job suite until the service recovers.

AI Team Self-Improvement

When an agent-run CI failure shows repeated fatal: unable to access ... 500 during the initial fetch, do not chase code fixes. Instead, identify it as a GitHub infrastructure incident, wait a few minutes, and rerun the workflow (or ask ops to investigate) before making any code changes.

Historical Context

Searching existing [CI Failure Doctor] issues (57 historical investigations) finds none currently open that reference the git fetch 500 pattern; the most recent records (run #34570, #34586, etc.) are already closed, so this is a fresh incident for run #34603.

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• expires on Feb 10, 2026, 5:26 PM UTC