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log buffer contents on stream errors and timeouts

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Show chunks received, SSE lines parsed, and the contents of
the line buffer (up to 500 bytes) on both stream errors and
timeouts. This tells us whether we got partial data, a non-SSE
response, or truly nothing from the server.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>
This commit is contained in:
Kent Overstreet 2026-04-02 18:49:33 -04:00
parent 156626ae53
commit 3b80af2997
1 changed files with 25 additions and 3 deletions
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28
src/agent/api/mod.rs
View file

@ -392,15 +392,37 @@ impl SseReader {
}
Ok(Ok(None)) => return Ok(None),
Ok(Err(e)) => {
self.save_failed_request(&format!("stream error: {}", e));
let buf_preview = if self.line_buf.is_empty() {
"(empty)".to_string()
} else {
let n = self.line_buf.len().min(500);
format!("{}B: {}", self.line_buf.len(), &self.line_buf[..n])
};
let msg = format!(
"stream error after {} chunks, {:.1}s, {} sse lines: {} | buf: {}",
self.chunks_received,
self.stream_start.elapsed().as_secs_f64(),
self.sse_lines_parsed,
e, buf_preview,
);
let _ = self.ui_tx.send(UiMessage::Debug(msg.clone()));
self.save_failed_request(&msg);
return Err(e.into());
}
Err(_) => {
let buf_preview = if self.line_buf.is_empty() {
"(empty)".to_string()
} else {
let n = self.line_buf.len().min(500);
format!("{}B: {}", self.line_buf.len(), &self.line_buf[..n])
};
let msg = format!(
"stream timeout: no data for {}s ({} chunks, {:.1}s elapsed)",
"stream timeout: {}s, {} chunks, {} sse lines, {:.1}s elapsed | buf: {}",
self.chunk_timeout.as_secs(),
self.chunks_received,
self.stream_start.elapsed().as_secs_f64()
self.sse_lines_parsed,
self.stream_start.elapsed().as_secs_f64(),
buf_preview,
);
let _ = self.ui_tx.send(UiMessage::Debug(msg.clone()));
self.save_failed_request(&msg);