Apache Solr 9.0

It is a pleasure to inform that the next major release of the Apache Solr search server has been released. Please welcome Solr 9.0.

We have to admit that the number of changes in the search engine is quite extensive, so we are only mentioning some of them:

  • Solr now requires at least Java 11
  • Rate limit is now available in Solr
  • CLUSTERSTATUS command response now include health of the collection and shard
  • Temporal graph queries with DAY and WEEKDAY are now supported
  • Support for K nearest neighbors search landed!
  • Simple UI for executing SQL queries was added
  • Task management interface is available
  • Autoscaling replacement using placement plugins
  • Managed schema file managed-schema was renamed to managed-schema.xml
  • Data Import Handler was removed
  • Support for clusterstate.json file was removed
  • Support for maxShardsPerNode parameter during collection creation was removed
  • Metrics history collection was removed
  • Autoscaling framework was removed
  • Cross Data Center Replication (CDCR) was removed
  • Rule based replica placement was removed
  • Legacy Solr caches implementations were removed and users have to upgrade their configurations to use CaffeineCache instead

You can read the full list of changes at: https://lucene.apache.org/solr/9_0/changes/Changes.html.

Apache Solr 9.0 can be downloaded from http://www.apache.org/dyn/closer.cgi/lucene/solr.

2 thoughts on “Apache Solr 9.0

  • 24 July 2022 at 04:48

    Iam using solr in one of my application for long time.
    Now I want to upgrade to solr 9 and also want to retain data import handler which iam already using.
    As I know Data import handler is removed from solr 9 can you please help me with the steps to retain Data import handler while using solr 9

    Thanks in advance


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