June 30, 2026
Pantheon Search now supports Apache Solr 9.10.1 for Drupal 7, 10, and 11 sites, with improved security defaults, the unified highlighter, and performance enhancements. See the major changes in Solr 9 for details.
How to get Solr 9
Drupal 10 and 11
Solr 9 support is available through Search API Pantheon version 8.5.0.
For detailed setup instructions, see the Solr for Drupal 10/11 guide.
Drupal 7
Solr 9 support is available through the Pantheon Drupal 7 upstream version 7.105.1.
For detailed setup instructions, see the Solr for Drupal 7 guide.
Solr 3 and Solr 8 removal timeline
The previously announced removal schedule still holds:
- Solr 3 will be removed on February 9, 2027. Drupal sites using Solr 3 must migrate to Solr 9 before this date. WordPress sites using Solr 3 through the Solr Power plugin should consider switching to Elasticsearch.
- Solr 8 will be removed on July 11, 2027. Drupal 10 and 11 sites using Solr 8 should migrate to Solr 9 before this date.
Feedback
Report issues or provide feedback in the drupal.org issue queue for Drupal 10/11, or through Pantheon Support for Drupal 7.