[smoke-detector] ✅ #2357 Fixed, NEW Issue: GitHub MCP Docker Connection Failure - Run #18797919838

[github-actions]

✅ Safe-outputs Path Fix VERIFIED - But NEW Issue Discovered: GitHub MCP Docker Failure

Good News! 🎉

The safe-outputs path mismatch from #2357 is FIXED! Commit 835022311824 successfully resolved the path inconsistency.

Evidence of Fix

From run #18797919838 session log:

2025-10-25T04:05:15.031Z [LOG] Starting MCP client for safe_outputs with command: node and args: /tmp/gh-aw/safeoutputs/mcp-server.cjs
...
2025-10-25T04:05:15.071Z [LOG] MCP client for safe_outputs connected, took 39ms
2025-10-25T04:05:15.071Z [LOG] Started MCP client for safe_outputs
...
2025-10-25T04:05:15.745Z [DEBUG] Adding tool: safe_outputs-create_issue
2025-10-25T04:05:15.745Z [DEBUG] Adding tool: safe_outputs-missing_tool

✅ Safe-outputs MCP server:

• Path: /tmp/gh-aw/safeoutputs/mcp-server.cjs (matches workflow)
• Status: Connected successfully in 39ms
• Tools loaded: create_issue, missing_tool

New Issue Discovered ⚠️

However, the workflow still failed, but for a completely different reason: The GitHub MCP server (Docker-based) is failing to start.

The New Error

2025-10-25T04:05:15.023Z [LOG] Starting MCP client for github with command: docker and args: run,-i,--rm,-e,GITHUB_PERSONAL_ACCESS_TOKEN,ghcr.io/github/github-mcp-server:v0.19.1,--read-only
...
2025-10-25T04:05:15.259Z [LOG] MCP transport for github closed
2025-10-25T04:05:15.260Z [ERROR] Failed to start MCP client for github: McpError: MCP error -32000: Connection closed
2025-10-25T04:05:15.260Z [DEBUG] GitHub MCP server is disabled, skipping auto-configuration

❌ GitHub MCP server:

• Docker command: docker run -i --rm -e GITHUB_PERSONAL_ACCESS_TOKEN ghcr.io/github/github-mcp-server:v0.19.1 --read-only
• Status: Connection closed after 236ms
• Error: MCP error -32000

Impact

1. Agent runs but without GitHub MCP tools (GitHub API access via MCP)
2. Agent falls back to trying gh CLI and curl for GitHub API access
3. Both fallbacks fail with "Permission denied" errors
4. Agent cannot complete task (reviewing last 5 merged PRs)
5. Agent reports needing GitHub API/tools but can't use missing_tool due to permissions

Likely Causes

The Docker connection failure after 236ms suggests:

1. Docker daemon not available in GitHub Actions runner
2. Docker socket permissions preventing container startup
3. Network connectivity issue to ghcr.io
4. Environment variable GITHUB_PERSONAL_ACCESS_TOKEN not properly configured
5. Docker service not running or not accessible

Run Comparison

Run	Safe-outputs MCP	GitHub MCP	Overall Status
#41 (previous)	❌ Path mismatch	❌ Failed (cascading)	Failed
#42 (this run)	✅ Working	❌ Docker failure	Failed (new issue)

Recommended Next Steps

Immediate Investigation

1. Check Docker availability in workflow

   - name: Check Docker
     run: |
       docker info || echo "Docker not available"
       docker ps || echo "Cannot list containers"

2. Test with simpler Docker image

   docker run hello-world
   docker run -i --rm alpine echo "test"

3. Verify environment variable

   - name: Check GitHub token
     run: |
       echo "Token length: ${#GITHUB_PERSONAL_ACCESS_TOKEN}"
       echo "Token set: $([[ -n $GITHUB_PERSONAL_ACCESS_TOKEN ]] && echo yes || echo no)"

Alternative Approaches

1. Use HTTP/stdio MCP instead of Docker

   • GitHub MCP server supports stdio mode
   • Would avoid Docker dependency

2. Pre-pull Docker image

   - name: Pre-pull GitHub MCP server
     run: docker pull ghcr.io/github/github-mcp-server:v0.19.1

3. Add Docker setup action

   - name: Set up Docker
     uses: docker/setup-docker-action@v1

Long-term Improvements

1. Add health checks for MCP servers before agent starts
2. Provide better error messages when Docker unavailable
3. Document Docker requirements for Copilot workflows
4. Consider fallback to non-Docker GitHub MCP server

Summary

Previous Issue (#2357): ✅ RESOLVED

• Safe-outputs path mismatch is fixed
• Safe-outputs MCP server works perfectly

New Issue: ❌ GitHub MCP Docker Connection Failure

• Docker-based GitHub MCP server fails to start
• Likely infrastructure/Docker availability issue
• Requires separate investigation and fix

Pattern: COPILOT_GITHUB_MCP_DOCKER_CONNECTION_CLOSED
Investigation saved: /tmp/gh-aw/cache-memory/investigations/2025-10-25-18797919838.json

Related Issues

• Closes #2357 (safe-outputs path mismatch - now fixed)
• Related to investigation runs that led to the fix

🤖 AI generated by Smoke Detector - Smoke Test Failure Investigator

AI generated by Smoke Detector - Smoke Test Failure Investigator