Release Schedule and Maintenance Policy

Updated September 11, 2023

Release Schedule · Maintenance Policy


Release Schedule

For more information on the changes planned for each release, please see the Project Roadmap

Note: We have not added a major release to the 2023 schedule yet. If/when we add one, it will replace a minor release in the 2.x line. See below for criteria for a major releases.

Release Number First RC Generated (release window opens) Latest Possible Release Date (release window closes) Release Date
2.10.0 September 07th September 25th  
1.3.13 September 14th September 21st  
2.11.0 October 4th October 18th  
1.3.14 December 5th December 12th  
2.12.0 January 9th, 2024 January 23rd, 2024  

OpenSearch follows semver, which means we will only release breaking changes in major versions. All minor versions are compatible with every other minor version for that major. For example, 1.2.0 will work with 1.3.2, 1.4.1, etc, but may not work with 2.0.

For minor version releases, OpenSearch follows “release window” model as described in our releasing documentation. The goal is to release a new minor version approximately every six weeks which includes all the new features and fixes that are ready to go. Once we enter a release window, every day we will generate a release candidate. When the exit criteria are met by a release candidate, we will make an announcement, update the release date column above and publish new artifacts on that date.

Note: If we cannot pass the exit criteria by 2 weeks after the start of the release cycle window (1 week for 1.x patch releases), we will cancel the minor release and hold changes until the next release window.

In contrast, OpenSearch releases new major versions only when there are a critical mass of breaking changes (e.g. changes that are incompatible with existing APIs). These tend to be tied to Lucene major version releases, and will be announced in the forums at least 4 weeks prior to the release date.

Both the roadmap and the release dates reflect intentions rather than firm commitments and may change as we learn more or encounters unexpected issues. If dates do need to change, we will be as transparent as possible, and log all changes in the changelog at the bottom of this page.

Maintenance Policy

For OpenSearch and other software in the OpenSearch project, new features and active development always takes place against the newest version. The OpenSearch project follows the semantic versioning specification for assigning version numbers to releases, so you should be able to upgrade to the latest minor version of that same major version of the software without encountering incompatible changes (e.g., 1.1.0 → 1.3.x).

Sometimes an incompatible change is unavoidable. When this happens, the software’s maintainers will increment the major version number (e.g., increment from OpenSearch 1.3.z to OpenSearch 2.0.0). The last minor version of the previous major version of the software will then enter a maintenance window (e.g., 1.3.x). During the maintenance window, the software will continue to receive bug fixes and security patches, but no new features.

We follow OpenSSF’s best practices for patching publicly known vulnerabilities and we make sure that there are no unpatched vulnerabilities of medium or higher severity that have been publicly known for more than 60 days in our actively maintained versions.

The duration of the maintenance window will vary from product to product and release to release. By default, versions will remain under maintenance until the next major version enters maintenance, or 1 year passes, whichever is longer. Therefore, at any given time, the current major version and previous major version will both be supported, as well as older major versions that have been in maintenance for less than 12 months. Please note that, maintenance windows are influenced by the support schedules for dependencies the software includes, community input, the scope of the changes introduced by the new version, and estimates for the effort required to continue maintenance of the previous version.

The software maintainers will not back-port fixes or features to versions outside of the maintenance window. That said, PRs with said back-ports are welcome and will follow the project’s review process. No new releases will result from these changes, but interested parties can create their own distribution from the updated source after the PRs are merged.

Major Version Latest Minor Version Status Initial Release Maintenance Window Start Maintenance Window End
1 1.3.x Maintenance July 12, 2021 May 26, 2022 GA release of 3.0.
2 2.0.0 Current May 26, 2022 N/A N/A

*Note that the length of the maintenance window is an estimated minimum and the project may, at its discretion, extend it to a later date

Release History

Release Number Release Date
2.1 July 7, 2022
1.3.4 July 14, 2022
2.2 August 11, 2022
1.3.5 September 1, 2022
2.2.1 September 1, 2022
2.3 September 14, 2022
1.3.6 October 6, 2022
2.4 November 15, 2022
1.3.7 December 13, 2022
2.5.0 January 24th, 2023
1.3.8 February 2nd, 2023
2.6.0 February 28th, 2023
1.3.9 March 9th, 2023
2.7.0 April 17th, 2023
1.3.10 May 11th, 2023
2.8.0 May 30th, 2023
1.3.11 June 22nd, 2023
2.9.0 July 11th, 2023

Change Log

Date Change Reason
July 1, 2022   Initial Version
October 20,2022 Increased time between 2.5 code freeze and release 7 days is standard, and there were only 2 days for 2.5
October 20,2022 Added Initial 2023 schedule Current schedule was running out
January 13, 2023 Update to 2.5.0 release date Maps team found last minute issue, moving to accommodate resolution
January 19, 2023 Update to 2.5.0 release date Docs team due diligence, moving to accommodate
April 26, 2023 Update to 2.7.0 release date Found CVE to resolve, fix issues found in regression tests
July 17, 2023 Update to 2.9.0 release date No-Go on the release meeting call - build issues
July 20, 2023 Update to 2.9.0 release date No-Go on the release meeting call - build issues
August 14, 2023 Updated release table to reflect release windows per adoption of https://github.com/opensearch-project/project-website/pull/1866
September 5th, 2023 Updated 2.10 date Original release date was too close to US Labor Day Holiday
September 6th, 2023 Updated 2.10 date 8 hour github outage last night - moving to accomodate a few final fixes
September 11th, 2023 Link to RELEASING.md updated link from proposal to releasing documentation
September 29th, 2023 Updated 2.11 date Per discussion in this issue