THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- Solr is now built and released independently from Lucene (separate Apache projects)
- Build system switched to Gradle, no longer uses Ant + Ivy
- Docker image creation is now a part of the Apache Solr Github repo
- Docker image documentation is now a part of the reference guide
- Official Docker image upgraded to use JDK17 (by Eclipse Temurin) and ability to create functionally identical local image
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Other
- Admin UI support for SQL Querying
- Contrib modules are now just "modules". You can easily enable module(s) through environment variable SOLR_MODULES
- Features lifted out as separate modules are: HDFS, Hadoop-Auth, Scripting and JWT-Auth
- The "dist" folder in the release is gone. Module jars are now inside respective module's lib/ folder
- 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
- SolrJ class CloudSolrClient now supports HTTP2. It has a new Builder. See CloudLegacySolrClient (deprecated) for the 8.x version of this class
- Jetty Request log is now enabled by default, i.e. logging every request
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