Cloudera Docs

What's New in Apache Solr

Learn about the new features of Apache Solr in Cloudera Runtime 7.3.1.

Data Discovery and Exploration (Technical Preview)

A new Data Discovery and Exploration cluster definition is available in Data Hub. It lets you explore and discover data sets ad-hoc; doing relevance-based analytics over unstructured data (logs, images, text, PDFs, etc). The cluster definition deploys HDFS, Hue, Solr, Spark, Yarn, and ZooKeeper services. The cluster definition is available for AWS.

  • ZooKeeper SSL can now be configured for Solr and HBase Indexer. For more information, see Enabling ZooKeeper SSL/TLS for Solr and HBase Indexer.
  • Solr now supports rolling upgrades. This means that rolling upgrades are available from release 7.3.1 to higher. Upgrades to release 7.3.1 still involve service downtime.

  • Apache Solr is updated from 8.4.1 to 8.11.2 in this release of Cloudera Runtime. For more information, see Apache Solr Release Notes in the upstream documentation. For the list of notable unsupported features, see Unsupported features.

  • Using Local File System (LFS) for both MapReduce Indexer Tool (MRIT) and HBase MRIT is now supported.

  • Spark 3 is now supported.

  • Spark 2 is deprecated in this release and support will be dropped in an upcoming release.

  • This release introduces the following two health checks for the Solr service which give information about the status of the cores hosted on different hosts:

    Recovering cores
    By default this check reports concerning health if any of the hosted cores are in recovering status. This threshold can be modified in the configurations with the solr_recovering_core_thresholds confiuration parameter.
    Critical cores
    By default this check reports "bad health" if any of the hosted cores are in down or recovery failed status. This threshold can be modified in the configurations with the solr_critical_core_thresholds config.

    These checks are enabled by default for the Infra Solr service but disabled by default for the Workload Solr services (Cloudera Search).

  • Critical CVE fixes.