[FLINK-AGENTS][integrations] Fix OpenSearchVectorStore for Amazon OpenSearch Serverless#678
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[FLINK-AGENTS][integrations] Fix OpenSearchVectorStore for Amazon OpenSearch Serverless#678avichaym wants to merge 1 commit into
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…nSearch Serverless Fixes apache#674 The OpenSearchVectorStore supports both OpenSearch Service domains and OpenSearch Serverless (AOSS) via service_type (defaults to "serverless"). When running against AOSS, some operations fail due to differences in SigV4 signing requirements, supported index APIs, bulk ingestion constraints, and KNN engine capabilities. This change addresses each AOSS-specific issue while preserving identical behaviour against provisioned domains: - Add x-amz-content-sha256 and Content-Length headers before SigV4 signing (AOSS rejects writes without them) - Skip _refresh calls on serverless (API not exposed on AOSS) - Omit custom _id in _bulk action lines on serverless (AOSS rejects them with "Document ID is not supported") - Validate _bulk responses for partial failures (was silently losing data on both AOSS and domains) - Specify FAISS/HNSW engine in createKnnIndex (default NMSLIB on AOSS cannot serve filtered KNN queries) - Add 15s post-create settle on serverless for index propagation Tested end-to-end against a live AOSS VECTORSEARCH collection in us-east-1.
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Fixes #674
The integration defaults to service_type=serverless but doesn't actually work against AOSS. Five fixes:
Also adds a 15s settle after index creation on serverless for AOSS propagation.
Tested end-to-end against a live AOSS VECTORSEARCH collection.