If your search engine is mysql
Before 2.4, MySQL was the default catalog search engine, but MySQL is no longer supported in this capacity. Now, you must install and configure Elasticsearch or OpenSearch as your search engine before upgrading to 2.4.
Use the following resources to help guide you through this process:
After you configure the search engine and reindex, you are ready to upgrade to 2.4.
If your search engine is elasticsearch
Elasticsearch 6 and earlier are no longer supported.
A value of elasticsearch
indicates your down-level version of Adobe Commerce is configured to use Elasticsearch 2.x. This version of Elasticsearch is no longer supported.
You must perform the following tasks before upgrading to 2.4:
-
Update to a version of Elasticsearch that is supported by Commerce. Refer to Upgrading Elasticsearch for full instructions on backing up your data, detecting potential migration issues, and testing upgrades before deploying to production. Depending on your current version of Elasticsearch, a full cluster restart may or may not be required.
NOTE
Elasticsearch requires JDK 1.8 or higher. See Install the Java Software Development Kit (JDK) to check which version of JDK is installed. -
Configure Elasticsearch and reindex.
After you configure the search engine and reindex, you are ready to upgrade to 2.4.