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Error Log: Illegal_argument_exception – “Text fields are not optimised…”

November 19, 2025
Error Log: This is another common root_cause for a query failure. JSON { "error": { "root_cause": [ { "type": "illegal_argument_exception", "reason": "Text fields... Read more.

Error Log: “timed_out: true” – The slow query

November 19, 2025
Error Log: You don’t see this in the OpenSearch logs; you see it in the response to your search query. The query returns partial results, and the JSON contains... Read more.

Error Log: “memory locking requested but memory is not locked”

November 19, 2025
Error Log: This is a critical error that appears in your opensearch.log file on node startup, and it will prevent the node from starting. None memory locking requested...... Read more.

Error Log: “OpenSearch bootstrap checks failed” – The startup blocker

November 19, 2025
Error Log: This is a high-level error in your opensearch.log that stops your node from starting. It’s a “wrapper” error—the real reasons are... Read more.

OpenSearch Navigates LLM-Driven Search and Observability

November 16, 2025
Read more.

IBM Joins OpenSearch Software Foundation to Advance AI-Powered Search and RAG

November 12, 2025
Read more.

OpenSearch Software Foundation Welcomes IBM as a Premier Member

November 11, 2025
IBM joins the Foundation to advance the organizations’ shared commitment to open, transparent, and community-driven search and analytics innovation Summary The... Read more.

Scaling to 1B Vectors: What DataStax Learned Using OpenSearch and JVector

November 11, 2025
Watch as DataStax details their experience with OpenSearch, demonstrating how they built billion-scale vector indexes saving time with OpenSearch.  Executive... Read more.

OpenSearch 3.3’s New AI Agents Now Generally Available for Developers

October 16, 2025
Read more.

How RAG Continues To ‘Tailor’ Well-Suited AI

October 10, 2025
Read more.

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OpenSearch is a community-driven, Apache 2.0-licensed open source search and analytics suite that makes it easy to ingest, search, visualize, and analyze data.

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  • About
    • Foundation
    • Governing Board
    • Charter
    • Meeting Calendar
  • Platform
    • Platform
      • OpenSearch CoreOpenSearch is a powerful search and analytics engine built on Apache Lucene.
      • OpenSearch DashboardsOur data visualization toolset is a flexible, fully integrated solution for visually exploring and querying your data.
      • OpenSearch Data PrepperA server-side data collector designed to enrich, transform, and aggregate data for downstream analytics with Opensearch.
      • Vector Search IconOpenSearch Vector EnginePower machine learning and generative AI applications with a high-performance database designed for the way AI understands data.
    • Capabilities
      • Machine learning and AI
        • Vector Search
        • Anomaly Detection
      • Search
        • E-Commerce
        • Document Search
        • Search Relevance
      • Observability
        • Performance Monitoring
        • Log Analytics
      • Security Analytics
        • Threat Intelligence
        • Event Correlation
    • Performance Benchmarks
      • View key performance metrics across different workloads
      • View Data
      • Roadmap
      • Image
      • OpenSearch Project RoadmapExplore our official project roadmap on GitHub
  • Community
    • OpenSearch Community
      • ForumFind answers to your questions, help others in the community, and join the conversation.
      • EventsCommunity Meetings, Development Backlog & Triage, in-person, and virtual events.
      • AmbassadorsAmbassadors Community leaders who share knowledge and grow OpenSearch.
      • Solutions ProvidersFind open-source providers offering solutions and services.
      • ProjectsHighlights of projects built by the community.
      • User GroupsJoin the OpenSearch Project Meetup Network
    • Community Resources
      • SlackSpeak with other developers.
      • GitHub Project OrganizationJoin us for in-person and virtual events to learn the latest about the project.
    • OpenSearchCon
      • Image
      • OpenSearchCon China17-18 March 2026 | Shanghai, China
      • OpenSearchCon Europe16-17 April 2026 | Prague, Czechia
      • OpenSearchCon India15-16 June 2026 | Mumbai, India
  • Documentation
    • Documentation Library
      • OpenSearch and DashboardsBuild your OpenSearch solution using core tooling and visualizations.
      • OpenSearch Data PrepperFilter, mutate, and sample your data for ingestion into OpenSearch.
      • Migration IconMigration AssistantBegin your transition to OpenSearch with our migration toolkit
    • Documentation Library II
      • OpenSearch BenchmarkMeasure performance metrics for your OpenSearch cluster.
      • ClientsInteract with OpenSearch from your application using language APIs.
  • Blog & News
    • Blog
    • Announcements
    • Case Studies
    • News
    • Authors
  • Downloads