Issue Review: cloudflare/workers-sdk#6562

Summary

Shutting down wrangler dev server logs ENOENT errors in console when temp files are deleted before miniflare/esbuild finishes using them.

Findings

• Created: 2024-08-22
• Updated: 2025-10-30
• Version: wrangler 3.72.2 → 4.61.0
• Component: wrangler
• Labels: bug
• Comments: 7

Key Evidence

• Error appears occasionally when shutting down dev server (via x hotkey or Ctrl+C)
• Reporter @threepointone (Cloudflare employee) suspects race condition: miniflare/esbuild stays alive after temp directory deleted
• Error also appears in CI runs
• Dec 2024 update: Similar error now happens during local dev on file changes, breaking the dev server for future requests
• No log file path shown with more info
• Added to backlog per @lrapoport-cf comment (Nov 2024)

Recommendation

Status: KEEP OPEN

Reasoning: Valid race condition bug affecting dev server stability. The Dec 2024 update indicates the problem has worsened - now affects live file changes, not just shutdown. This breaks the development workflow. Filed by Cloudflare employee who can reproduce consistently.

Action: Investigate the cleanup ordering during shutdown and file changes. Ensure miniflare/esbuild fully shuts down before temp directories are deleted.

Suggested Comment

N/A - Already acknowledged and added to backlog by maintainer.