Solr 9: A Major Milestone
Apache Solr 9 represents a significant evolution of the Solr platform, bringing substantial improvements in performance, security, and modern Java support. You can create a Solr 9 index right now from your Opensolr Control Panel.
Key Features in Solr 9
- Java 11+ Required — Solr 9 requires Java 11 as the minimum runtime, with full support for Java 17. This brings better performance, modern language features, and long-term security updates.
- Improved Security Defaults — Solr 9 ships with more secure default configurations, making it harder to accidentally expose an unprotected index.
- Module System — Functionality previously bundled as contribs has been reorganized into a cleaner module system, making it easier to enable or disable features.
- Removed Legacy Components — Several deprecated features have been removed, including the Data Import Handler (DIH), velocity response writer, and the legacy SolrCell (Tika) integration. This results in a leaner, more maintainable codebase.
- Performance Improvements — Upgraded to Apache Lucene 9 under the hood, delivering faster indexing and query performance.
- SolrJ Improvements — The Java client library has been modernized with HTTP/2 support and a cleaner API.
Web Crawler Ready
Solr 9 indexes on Opensolr are Web-Crawler-Ready out of the box. You can use the Opensolr Web Crawler to build your own site search engine directly from the Opensolr Query APIs, within minutes — no additional configuration required.
Looking Ahead: Solr 10
Apache Solr 10 is the latest major release, building on the foundation laid by Solr 9. It continues the modernization effort with further performance optimizations and API improvements. Opensolr supports the latest Solr versions as they become available.
Legacy Version Support: Solr 3 through 8
Solr versions 3, 4, 5, 6, 7, and 8 have all reached End of Life (EoL) per the Apache Software Foundation, meaning they no longer receive official updates or security patches.
However, Opensolr is the only hosting provider that still fully supports all of these legacy versions. If your application depends on an older Solr version — whether for compatibility reasons, specific features like DIH, or simply because migration is not yet feasible — Opensolr has you covered. You can continue running your existing indexes on any Solr version from 3 through 8 with full support.
Getting Started with Solr 9
Ready to try Solr 9? Create a new index from the Opensolr Control Panel and select Solr 9 as the version. Need Solr 9 in a specific region? Contact us and we will provision your instance right away.