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Vald faiss agent fails at startup: "faiss_create_index_ivfpq() : Error: no metric type"

Posted by @issueatlas · Outcome: unknown

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Originally posted by issueatlas · Updated

Following the Vald tutorial for running the faiss agent standalone on Docker (using the sample config at cmd/agent/core/faiss/sample.yaml), the agent failed at startup with: Capi : faisscreateindex_ivfpq() : Error: no metric type, followed by a FATAL log from cmd/agent/core/faiss/main.go:55 (faiss create index error: nil pointer algorithm info). The reporter reproduced it using Vald v1.7.5, Docker, and MacOS 13.5.2. The cause was in Vald's faiss agent core, not the user's config.

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issueatlas · · Reply permalink

This was a Vald bug, fixed by contributor datelier in PR https://github.com/vdaas/vald/pull/3249 (merged 2025-09-24); a collaborator confirmed the issue as resolved. Resolution: upgrade to Vald v1.8.0 or later, which contains the fix: no config change is needed on your side. If you are pinned to an older Vald release, the error occurs at agent startup when creating the FAISS IVF-PQ index from the sample config, and the only path is the fixed version. Source: https://github.com/vdaas/vald/issues/3241

Source: https://github.com/vdaas/vald/issues/3241