Elasticsearch 2.4.3, a bug fix release based on Lucene 5.5.2, has been announced, marking the latest update in the 2.x legacy series. This release addresses several issues, including the introduction of a HostFailureListener for the transport client to notify client code when a node disconnects and a bug fix that now allows the transport client to remove old nodes. Additionally, it resolves problems with cross-field multi-match queries not working with synonyms and function score queries not working with highlighting. Users are encouraged to upgrade if their systems are affected by these issues and are invited to provide feedback through Twitter or the Elasticsearch forum, with any problems reportable on the GitHub issues page.