Issue Review: cloudflare/workers-sdk#8837

Summary

Vitest integration can leave orphaned node processes running at 100% CPU after tests complete.

Findings

• Created: 2025-04-07
• Updated: 2025-12-17
• Version: wrangler 3.107.3 → wrangler 4.61.0
• Component: vitest (unstable_dev), Workers Vitest Integration
• Labels: bug, awaiting Cloudflare response
• Comments: 9

Key Evidence

• Issue reported via Twitter, reproduction repo: https://github.com/danthegoodman1/DurableStreams
• Orphaned node (vitest) processes consuming 99.7% CPU
• Uses unstable_dev() API, not vitest-pool-workers
• Maintainer @petebacondarwin could reproduce orphaned vitest process but not consistently
• Both clean exits and ctrl-c can trigger the orphan
• Label indicates awaiting Cloudflare response

Recommendation

Status: KEEP OPEN

Reasoning: This is a serious developer experience issue that causes laptops to drain battery. The maintainer partially reproduced it but couldn't consistently trigger it. The label "awaiting Cloudflare response" indicates it needs internal investigation.

Action: Needs more investigation to determine root cause of orphaned processes. Consider adding process cleanup timeout or parent process monitoring.

Suggested Comment

N/A - Issue has "awaiting Cloudflare response" label.