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An openGauss query or get that finds nothing returns before the rollback that ends its read-only transaction, so the session keeps the connection it checked out of the pool. Retrieval fans out over worker threads and the session is thread-local, so every thread that runs an empty read holds a connection for the lifetime of that thread, and vector search eventually fails with a pool checkout timeout that a restart is the only way out of. Empty reads are routine: an empty knowledge base, a file whose chunks were deleted, or a metadata filter that matches nothing all produce one. Rolling back before the two early returns puts the connection back. Measured by driving OpenGaussClient itself with a pool of 5: three empty query reads left 3 connections checked out and 0 free before the change, and 0 checked out with 3 free after, same for get. search is already correct, it has no early return. The pgvector client had the same defect, fixed separately in #30142. |
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| .. | ||
| data | ||
| internal | ||
| migrations | ||
| models | ||
| retrieval | ||
| routers | ||
| socket | ||
| static | ||
| storage | ||
| tools | ||
| utils | ||
| __init__.py | ||
| alembic.ini | ||
| config.py | ||
| constants.py | ||
| env.py | ||
| events.py | ||
| functions.py | ||
| main.py | ||
| tasks.py | ||