In Solr 8.x, there have been some notable deprecations in Solr. However, some of them are merely moving elsewhere. Here is the status of some of those efforts:
| Component | Status in Solr 8.x | Status in Solr 9.0 | Package Status | Package location | Remarks |
|---|---|---|---|---|---|
| SolrClient impls that depend on Apache HttpClient | Deprecate: SOLR-15223 - Getting issue details... STATUS | n/a | Use the SolrClient impls based on Jetty HTTP client | ||
| Data Import Handler | Deprecated in 8.6 | SOLR-14783 - Getting issue details... STATUS | Community package released | https://github.com/rohitbemax/dataimporthandler | |
| Velocity | Deprecated in 8.4 | SOLR-14792 - Getting issue details... STATUS | Community package released | https://github.com/erikhatcher/solritas | |
| CDCR | Deprecated in 8.6 | SOLR-14616 - Getting issue details... STATUS | No efforts for community package underway yet | TBD | |
| Storing indexes and backups in HDFS | Deprecated in 8.6 | SOLR-13989 - Getting issue details... STATUS | Community package efforts underway | TBD | Some volunteers are already working on this. |
| Autoscaling framework | Removed in: SOLR-14656 - Getting issue details... STATUS | Autoscaling framework has been replaced with a new plugin for replica placement only. Some aspects of the original framework are not replaced at all at this time (but may be in the future). | n/a | ||
| Tika / SolrCell | Under discussion: SOLR-13973 - Getting issue details... STATUS | No efforts for community package underway yet | TBD | ||
| Solr Admin UI | No change in current status | A new admin UI (which can replace current UI, if needed) is being actively worked on | https://github.com/yasa-org/yasa | ||
| Runtime lib plugin loading from blob store | SOLR-14654 - Getting issue details... STATUS | NA | NA | Replaced by Package Management System | |
| StatelessScript UpdateProcessor | Did not deprecate | Moved to new "scripting" contrib: SOLR-14067 - Getting issue details... STATUS | N/A; staying as a 1st party contrib | TBD | This should be extremely easy to package |
| Metrics History | Deprecated in 8.9 | Removed in SOLR-15416 - Getting issue details... STATUS |