OpenSearch (AWS)

Amazon OpenSearch Service Deprecating OpenSearch 3.5

Amazon OpenSearch Service supports OpenSearch version 3.4 and 3.5. For more information, seeOpenSearch 3.4 release notesandOpenSearch 3.5 release notes. For information about OpenSearch 3.4 and 3.5 operations, see theOpenSearch REST API reference, or the API reference for the specific plugin. For a complete list of breaking changes, refer to the OpenSearch documentationhere. | March 17, 2026

17 Mar 2026

OpenSearch: 'Skip to content' functionality unavailable — critical incident

Date not specified

OpenSearch 3.4.0 Release - Bug Fixes for WeightFunction, Field Data Caching, and Wildcard Queries

This release addresses three technical issues including incorrect constraint resets in WeightFunction allocation, flaky field data cache testing, and crashes in case-insensitive wildcard aggregation queries. These fixes improve system stability and reliability but do not require immediate user action.

17 Dec 2025

Amazon OpenSearch Service adds GPU acceleration for vector indexes and auto-optimize

Amazon OpenSearch Service now supports GPU acceleration for vector indexes, enabling faster vector search operations. Amazon OpenSearch Service also introduces auto-optimize to automatically tune collection performance and vector ingestion for simplified data loading. For more information, seeGPU acceleration for vector indexes,Auto-optimize, andVector ingestion. | December 2, 2025

2 Dec 2025

Amazon OpenSearch Service adds support for OpenSearch 3.2 and 3.3

Amazon OpenSearch Service supports OpenSearch version 3.2 and 3.3. For more information, seeOpenSearch 3.2 release notesandOpenSearch 3.3 release notes. For information about OpenSearch 3.2 and 3.3 operations, see theOpenSearch REST API reference, or the API reference for the specific plugin. | November 19, 2025

19 Nov 2025

OpenSearch releases 2.19.4 with bug fixes for task cancellation, memory management, and query processing

This release includes several bug fixes addressing task cancellation in aggregators, out-of-memory issues from excessive shard result buffering, and incomplete callback loops in query phase processing. These improvements enhance system stability and performance but do not require immediate user action.

6 Nov 2025

OpenSearch releases bug fixes for timestamp upgrades and aggregations

Three bug fixes were implemented to resolve issues with timestamp backward compatibility during upgrades, core updates with non-zero patch numbers, and IndexOutOfBoundsException errors in terms aggregations. These fixes improve system stability and resolve existing operational issues without requiring user action.

30 Oct 2025

OpenSearch 3.3.1: Core update and timestamp upgrade bug fixes

Fixed issues with core updates using non-zero patch numbers and backward compatibility problems during timestamp field upgrades. These are maintenance fixes that improve system stability and upgrade processes without requiring user action.

22 Oct 2025

Amazon OpenSearch Service now supports Graviton4-based instance families

Amazon OpenSearch Service now supports Graviton4-based instance families (c8g, m8g, r8g, r8gd). For more information, seeSupported instance types in Amazon OpenSearch Service. | October 17, 2025

17 Oct 2025

OpenSearch 3.3.0 Release - Bug Fixes and Stability Improvements

OpenSearch resolved three technical issues including unnecessary refreshes during update preparation failures, a null pointer exception in segment replicator, and plugin coverage testing when security manager is enabled. These fixes improve system stability and testing capabilities but do not require immediate user action.

14 Oct 2025

Amazon OpenSearch Ingestion adds ML offline batch inference

Amazon OpenSearch Ingestion (OSI) pipelines support machine learning (ML) offline batch inference processing to efficiently enrich large volumes of data at low cost. Use offline batch inference whenever you have large datasets that can be processed asynchronously. Offline batch inference works with Amazon Bedrock and SageMaker models. This feature is available in all AWS Regions that support OpenSearch Ingestion with OpenSearch Service 2.17+ domains. For more information, seeUsing an OpenSearch Ingestion pipeline with machine learning offline batch inference. | October 2, 2025

2 Oct 2025

New: CloudFormation templates for semantic highlighting with SageMaker

Semantic highlighting is an advanced search feature that enhances result relevance by analyzing the meaning and context of queries rather than relying solely on exact keyword matches. This capability uses machine learning models to evaluate semantic similarity between search queries and document content, identifying and highlighting the most contextually relevant sentences or passages within documents. Amazon OpenSearch Service now includes a CloudFormation templates that automatically configures Amazon SageMaker models for semantic highlighting. For more information, seeRemote inference for semantic highlighting templates. | September 26, 2025

26 Sept 2025

New: Configure OpenSearch Ingestion pipelines for cross-account ingestion

For push-based sources such as HTTP and OTel, Amazon OpenSearch Ingestion enables you to share pipelines across AWS accounts from a virtual private cloud (VPC) to a pipeline endpoint in a separate VPC. For more information, seeConfiguring OpenSearch Ingestion pipelines for cross-account ingestion | September 19, 2025

19 Sept 2025

Amazon OpenSearch Ingestion ServiceRolePolicy managed policy updated — VPC endpoint sharing enabled

The update gives OpenSearch Ingestion permission to modify VPC endpoints created by OpenSearch in order to share pipelines across VPCs. | September 19, 2025

19 Sept 2025

Amazon OpenSearch Serverless supports disk-based vector search

Disk-based vector search significantly reduces the operational costs for vector workloads in low-memory environments. For more information, seeDisk-based vector search. | September 18, 2025

18 Sept 2025

Amazon OpenSearch Service announces support for OpenSearch 3.1

Amazon OpenSearch Service supports OpenSearch version 3.1. For information about upgrade compatability, seeSupported upgrade paths. For more information about changes in the new versions, see the OpenSearch3.0and3.1documentation. For information about OpenSearch 3.1 operations, see theOpenSearch REST API reference, or the API reference for the specific plugin. | September 9, 2025

9 Sept 2025

Amazon OpenSearch Serverless now supports FIPS 140-2

FIPS 140-2, is a U.S. and Canadian government standard that specifies security requirements for cryptographic modules that protect sensitive information. Amazon OpenSearch Serverless FIPS endpoints are available in AWS Regions where FIPS is supported. These endpoints use TLS 1.2 or later and FIPS-validated cryptographic algorithms for all communications. | September 5, 2025

5 Sept 2025

OpenSearch releases bug fixes: node stats, JDK version, Jenkins authentication

Three technical bug fixes were implemented including resolving a null pointer exception in node stats, correcting a JDK version typo, and adding authentication for Jenkins calls. These are routine maintenance fixes that improve system stability and functionality without requiring user action.

21 Aug 2025

OpenSearch releases version 2.19.3 with bug fixes

OpenSearch released bug fixes addressing error handling improvements and null pointer exception prevention. These fixes enhance system stability by improving input validation and query processing reliability. No action required as these are routine maintenance updates.

21 Aug 2025

OpenSearch bug fixes: task cancellation, profiler timing, regex queries

Minor bug fixes addressing task cancellation checks in aggregators, concurrent timing issues in the profiler, and regex query functionality with field aliases. These improvements enhance system stability and query performance but do not require any user action.

19 Aug 2025