informatics-isi-edu / deriva-mcp-core / 26933708623

90%

push

github

warn when lifecycle hook blocks the event loop for more than 0.5s

  Plugin handlers that make synchronous blocking calls (ChromaDB writes, catalog fetches) without asyncio.to_thread stall the asyncio event loop and delay all concurrent requests. Observed in production: vocabulary and dataset RAG indexing in deriva-ml-mcp-plugin blocking the event loop for 55+ seconds on first connect, preventing rag_search calls from executing. Added duration tracking in _safe_call: any hook that takes >= 0.5s emits a WARNING naming the hook and directing the author to asyncio.to_thread().

7 of 8 new or added lines in 1 file covered. (87.5%)

3187 of 3538 relevant lines covered (90.08%)

0.9 hits per line