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Error log: “root mapping definition has unsupported parameters”

November 21, 2025
Error log: You’ll see this error when trying to create an index or an index template, and your _mappings structure is wrong at the very top level. JSON None... Read more.

Error log: Disk “high” watermark exceeded – The final warning

November 21, 2025
Error log: This is not an error, but a critical warning in your opsearch.log file. It’s the step before your cluster locks up (Blog #5). None     high...... Read more.

Error log: IndexPrimaryShardNotAllocatedException – The red index

November 21, 2025
Error log: This error appears as the root_cause when you try to query an index that is in a red state. JSON None {   "error": {     "root_cause": [       {... Read more.

Error log: XContentParseException – The malformed JSON

November 21, 2025
Error log: This is a low-level error that means the JSON you sent in your request body is broken. JSON None {   "error": {     "root_cause": [       {... Read more.

IBM to boost OpenSearch with AI & analytics expertise

November 20, 2025
Read more.

Error Log: MasterNotDiscoveredException – The cluster’s lost leader

November 19, 2025
Error Log: You’ll frequently see this in node logs when a node is attempting to join a cluster or reconnect: master not discovered yet, this node has...... Read more.

Error Log: index_not_found_exception – The missing index

November 19, 2025
Error Log: This is a very clear and common error, seen in both client logs and API responses. org.opensearch.index.IndexNotFoundException: no such index Or in a... Read more.

Error Log: mapper_parsing_exception – The “wrong data type” error

November 19, 2025
Error Log: This error happens during indexing (writing a document) and is a very common part of a bulk request failure: { "error" : { "root_cause" : [ { "type"...... Read more.

Error Log: HTTP 429 “Too many requests” (and EsRejectedExecutionException) – Overloaded cluster

November 19, 2025
Error Log: When your client application sends too many requests too quickly, it receives an HTTP 429 status code. HTTP/1.1 429 Too Many Requests Content-Type: application/json... Read more.

Error Log: “Authentication failed for a specific user” – The login failure

November 19, 2025
Error Log: This is a common error from the OpenSearch Security plugin, found in your opensearch.log files when a login attempt fails. None Authentication failed... Read more.

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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