low severityRedisVectorStoreRetriever, UpstashVectorStore
Chain crashes when using RedisVectorStoreRetriever asynchronously with similarity_distance_threshold; or Invalid vector dimension error (e.g., 4 vs expected 1024) in UpstashVectorStore with FakeEmbeddings.
Root cause
No specific root cause identified for a \"vector similarity threshold bug\" in Upstash Redis Vector. Related issues exist in LangChain Redis retrievers (async similarity_distance_threshold not implemented) and UpstashVectorStore dimension mismatches.
langchainredisupstashvectorstoresimilarity_distance_thresholddimension mismatchasync