Repository navigation
SSE timeout errors are not retried when chunkTimeout is exceeded #20466
Description
Description
When chunkTimeout is set in provider config and the LLM stops sending tokens for longer than the timeout (e.g., 60 seconds), an error "SSE read timed out" is thrown. However, this error is not retried by the session retry mechanism.
Plugins
No response
OpenCode version
latest
Steps to reproduce
- When the error
"SSE read timed out"is thrown, it gets converted toNamedError.Unknowninmessage-v2.ts:fromError() - In
retry.ts:retryable(), this error is treated as non-retryable because:- It's not an
APICallError - It's not a
ContextOverflowError - The
retryable()function tries to parse it as JSON (JSON.parse("SSE read timed out")), which fails, sojsonbecomesundefined, and the function returnsundefined(non-retryable)
- It's not an
Expected behavior:
- SSE timeout errors should be treated as retryable network errors
- The session should automatically retry when chunkTimeout is exceeded
Suggested fix:
Add a check in retry.ts:retryable() to recognize SSE timeout errors:
if (error.data.message?.includes("SSE read timed out")) {
return "SSE read timed out"
}
Additional context:
This affects any provider using chunkTimeout configuration
Users with custom providers that sometimes have long think times are affected
No current workaround except removing chunkTimeout which can cause the session to hang indefinitely
### Screenshot and/or share link
_No response_
### Operating System
_No response_
### Terminal
_No response_Reacted by Navendu Pottekkat
Metadata
Metadata
Assignees
Labels
No labels
Activity
github-actions commentedon Apr 1, 2026
This issue might be a duplicate of existing issues. Please check:
retry.ts, causing the session to halt instead of retrying. That issue coversoverloaded_errorfrom Anthropic; this one covers SSE timeout errors fromchunkTimeout. A fix for Anthropic overloaded_error is not retried, halts session #20384 may address or be extended to cover this case as well.opencode: drop chunkTimeout, add root pyrightconfig for LSP-payload fix
adamskrodzki commentedon Apr 28, 2026
Having same problem, I attach log with events generated in session by opencode before crash
https://gist.github.com/adamskrodzki/58122d96d2d165e3dc20e639176954af#file-gistfile1-txt
opencode: drop chunkTimeout, add root pyrightconfig for LSP-payload fix
fix: handle stream interruption for OpenAI-compatible providers
feat(opencode): make local turns survive, and make failures visible (#48