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Server becomes unresponsive after external client disconnects during SSE streaming #15149
Description
Description
When running opencode serve with external clients (e.g., via curl or API client), if the client disconnects abruptly while connected to SSE endpoints (/event or /global/event), the server enters a corrupted state where subsequent requests fail with "Unexpected EOF" errors.
Logs:
ERROR 2026-02-18T15:34:10 +10ms service=server error=Unexpected EOF failed
ERROR 2026-02-18T15:34:10 +1ms service=server error=Unexpected EOF failed
Plugins
"opencode-swarm@latest", "opencode-anthropic-auth@latest", "opencode-openai-codex-auth@latest", "opencode-zaxbystatus@latest"
OpenCode version
1.2.14
Steps to reproduce
Start opencode serve
Connect an external client to the SSE endpoint (e.g., curl http://localhost:4096/event)
Disconnect the client abruptly (Ctrl+C or close connection)
Try to make another request to the server
Server fails to respond - subsequent requests also show "Unexpected EOF" errors
Expected behavior: Server should remain stable and continue accepting new requests after client disconnects.
Screenshot and/or share link
No response
Operating System
Windows
Terminal
opencode electron gui
Activity
github-actions commentedon Feb 26, 2026
This issue might be a duplicate of or closely related to existing issues. Please check:
serveandwebcommands leak child processes on exit; SSE heartbeat interval leaks on server-initiated close #14091: Directly related — describes the SSE/eventendpoint leak where Hono'sonAbortonly fires on client disconnect, not on server-initiated close. This is likely the root cause of the corrupted state you're seeing after an external client disconnects abruptly.If your issue is specifically about the server becoming unresponsive (rather than just a resource leak), it may still be worth keeping open as a distinct symptom — but please review #14091 first to see if it covers your case.
neocody commentedon Mar 6, 2026
Seeing this in production with CodeNomad (desktop client for OpenCode).
OpenCode
servecloses the/eventSSE endpoint after ~7 seconds:After this, the SSE stream never reopens server-side. The desktop client loses all events and the UI goes blank across all workspace instances.
OpenCode 1.2.18, macOS 15.7.4 ARM64. Multiple workspaces open simultaneously.
github-actions commentedon Jul 4, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.