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…slot Since errors are sampled after beforeSend, a sampled-out error ran the whole event pipeline while holding a slot in the client's promise buffer. With an async event processor (e.g. ContextLines on Node), a burst of errors filled the buffer and dropped errors that would have been sent as queue_overflow. The pipeline only matters for a sampled-out error when there is an ok session it can update, so without one the error is now dropped right away.
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size-limit report 📦Compared: a46093f (PR test merge using develop at c125a5d) Against: c125a5d (develop) · base run #63629 ✅ Baseline matches: this diff contains only this PR's changes.
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Optional E2E testsSome optional checks were not successful. They do not block the merge. 3 not successful, 62 successful. See the run.
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Since #22671 sampled-out errors run the whole event pipeline while holding a client buffer slot, so error bursts on Node fill it up and real errors get dropped as queue_overflow, fixed by dropping sampled-out errors right away when there is no ok session for them to update.
I added tests showing sampled-out errors no longer overflow the buffer without a session and still go through the pipeline when one exists.