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Elasticsearch kNN: API Error (500 / 502 / 503)
Current Status: Operational
Last checked: 6m ago
What We're Seeing Right Now
No recent issues reported. If you're experiencing problems with Elasticsearch kNN, report below to help the community.
What is this error?
Elasticsearch kNN is returning server errors (HTTP 500, 502, or 503). Vector databases power real-time search and retrieval-augmented generation (RAG) applications — an outage directly impacts your AI product's ability to retrieve context, answer questions, or perform semantic search.
Error Signatures
500 Internal Server Error503 Service UnavailableIndex not foundFailed to upsert vectorsQuery timeoutConnection refusedupstream connect errorCommon Causes
- Vector index server overload from high query or upsert volume
- Backend storage layer issues affecting index persistence
- Scheduled maintenance or unplanned infrastructure downtime
- Regional cloud provider incident affecting Elasticsearch kNN's deployment
- Index corruption or replication lag causing query failures
✓ How to Fix It
- Check Elasticsearch kNN's status page for active incidents
- Verify your API key is valid and hasn't expired
- Check if the issue is isolated to specific indexes or affects all collections
- Implement retry logic with exponential backoff in your application
- If running RAG, consider a fallback response path when the vector store is unavailable
- Contact Elasticsearch kNN support with your index name and error details
Live Signals
Service Components
Elasticsearch Web
OperationalRecent Incidents
No incidents in the past 30 days
Frequently Asked Questions
Will my vector data be lost during a Elasticsearch kNN outage?
No. Vector databases replicate data across multiple nodes. An outage typically means temporary unavailability, not data loss. Your embeddings should be fully accessible once the service recovers.
How do I handle Elasticsearch kNN being down in my RAG application?
Implement a graceful fallback: catch the error, return a generic response or use a keyword-based search as backup, and retry vector queries automatically once connectivity is restored.
Is Elasticsearch kNN down right now?
Check the live status indicator at the top of this page for real-time monitoring data and community reports from other developers.