In a recent update from Elastic, it was announced that the Rivers feature in Elasticsearch is being deprecated, with full details and replacement recommendations available in Shay Banon's blog post. This week's developments in Elasticsearch and Apache Lucene include various updates and fixes, such as enhancements to the cat API, bug fixes in mappings and aggregations, and adjustments to scripting settings. Several plugins for Elasticsearch were released, including updates to language, river, and transport plugins. Apache Lucene is preparing for a 5.1.0 release with improvements like the extension of PrefixQuery and the introduction of a near-real-time document-based suggester. Additionally, Elastic's blog will continue to provide updates on the ELK ecosystem, offering insights into new features and use cases.