MongoDB Atlas Vector Search: index not found is usually a name or status problem

Not specified by the original author.

TL;DR

Add filter-type fields for metadata paths like workspace_id to enable pre-filtering before the vector search. The index name is case-sensitive and must match exactly what the query references.

Fix

1. Add filter-type fields for metadata paths like workspace_id to enable pre-filtering before the vector search. Expected: You get the expected result; the problem is gone.

When to use

• You are setting up or using this MongoDB Atlas Vector Search feature.
• The symptom matches: index not found is usually a name or status problem.

When NOT to use

• Unrelated MongoDB Atlas Vector Search issues (different feature, different failure).
• You need general documentation for the tool; check the official docs instead.

Compatibility

Reported against MongoDB Atlas Vector Search. Source: https://github.com/cristiantumani/corteza.app/blob/HEAD/setup-vector-search.md.

Variant phrasings

index not found is usually a name or status problem

Why it happens

Empty results or 'Cannot find index' errors almost always trace to the index name, its build status, or the dimension config.

Edge cases

• If your error message differs even slightly, this is probably a different issue; search the exact text.
• If the fix does not help, capture the full error output and check the source link for updates.

Source

https://github.com/cristiantumani/corteza.app/blob/HEAD/setup-vector-search.md

Source: Empty results or 'Cannot find index' errors almost always trace to the index name, its build status, or the dimension config.

Verified resolution: [cristiantumani/corteza.app + luvadlamudi/tamuhack26]: the index name is case-sensitive and must match exactly what the query references. Check the index status in the Atlas UI: Building means queries are not served yet. numDimensions must equal the embedding model's output (1536 for text-embedding-3-small, 3072 for text-embedding-3-large, 1024 for voyage-3-large). Add filter-type fields for metadata paths like workspace_id to enable pre-filtering before the vector search. And check Network Access: a missing IP whitelist entry makes every operation fail or hang with ServerSelectionTimeoutError.

Source URL: https://github.com/cristiantumani/corteza.app/blob/HEAD/setup-vector-search.md