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test(runtime): add Blockbuster runtime anchor for JsonlRunEventStore async IO (#3313)

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* test(runtime): add Blockbuster runtime anchor for JsonlRunEventStore async IO

#3084 offloaded `JsonlRunEventStore`'s file IO via `asyncio.to_thread` and added
a mock-based offload assertion (`tests/test_jsonl_event_store_async_io.py`) that
covers `put()` only. That guard is not part of the Blockbuster runtime gate
(`tests/blocking_io/`) run by `backend-blocking-io-tests.yml`.

Add a runtime anchor that drives the full async surface (`put`, `put_batch`,
`list_messages`, `list_events`, `list_messages_by_run`, `count_messages`,
`delete_by_run`, `delete_by_thread`) under the strict Blockbuster gate, so any
blocking IO reintroduced on the event loop in any of these methods fails CI —
not only removal of a specific `to_thread` call. Verified each offloaded method
goes red when its offload is reverted. Test-only; no production change.

* test(runtime): exercise list_events event_types filter branch

Per review feedback: the anchor called list_events without event_types,
so the filter branch never ran after _read_run_events' filesystem IO.
Add a second list_events call with event_types=["message"] so the full
read path -- including the filter branch -- executes under the gate.
This commit is contained in:
AochenShen99
2026-05-29 23:02:41 +08:00
committed by GitHub
parent ca487578a4
commit 052b1e2102
3 changed files with 73 additions and 4 deletions
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backend/docs/BLOCKING_IO_DETECTION.md
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@@ -134,11 +134,16 @@ that production actually executes.
## Current runtime coverage
The initial runtime anchors protect confirmed blocking-IO bug shapes:
The runtime anchors protect confirmed blocking-IO bug shapes:
- SQLite checkpointer setup, including path resolution and parent-directory
creation.
- Subagent skill metadata loading through `SubagentExecutor._load_skills()`.
- `JsonlRunEventStore` async API (`put` / `list_*` / `delete_*`): the JSONL
run-event backend offloads its synchronous file IO via `asyncio.to_thread`
(fix #3084); this anchor drives the real async API under the gate so any
blocking IO reintroduced on the loop fails, not only removal of one
`to_thread` call.
- Gate health checks: Blockbuster catches unoffloaded calls, opt-out works, and
patches are restored after exceptions.