The ElasticsearchConnectionConfiguration, a factory configuration for both DXP 7.3 and 7.2, has significant differences between the versions that should be highlighted in the upgrade context:
- 7.2 config name pattern: com.liferay.portal.search.elasticsearch.cross.cluster.replication.internal.configuration.ElasticsearchConnectionConfiguration-ccr.config
- 7.3 config name pattern: com.liferay.portal.search.elasticsearch7.configuration.ElasticsearchConnectionConfiguration-ccr.config
- The configurations are different between versions, as illustrated in the CCR docs
- On 7.3 the configuration is used for more than just CCR (and we should point out when it might be used) while on 7.2 the only supported usage is for CCR.