THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- Admin UI support for SQL Querying
- HDFS code is now an independent module
- Metrics handler only depends on SolrJ instead of core and has its own log4j2.xml now so it doesn’t share Solr’s logging config
Deprecations and Removal
- The Data Import Handler has been removed from Solr(DIH) is an independent project now; it is no longer a part of Solr.
- Legacy cloud mode is no longer supported
- No more support for clusterstate.json and MIGRATESTATE API has been removed. If your collections use clusterstate.json, please refer to the Upgrade Notes
- Auto scaling framework has been removed. Please refer to replica placement plugins for alternate options
- LegacyBM25SimilarityFactory has been removed
- VelocityResponseWriter has been removed from Solr. This encompasses all previously included /browse and wt=velocity examples.
- Legacy SolrCache implementations (LRUCache, LFUCache, FastLRUCache) have been removed. Users have to modify their existing configurations to use CaffeineCache instead.
- Cross Data Center Replication has been removed in this release.
- SolrJ clients like HttpSolrClient and LBHttpSolrClient that lacked HTTP2 support have been deprecated.
- SolrJ class CloudSolrClient, as it existed, has been renamed as CloudLegacySolrClient and deprecated. CloudSolrClient is re-introduced with HTTP2 support, including a new Builder. See Upgrade Notes
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