Elasticsearch 2.2.1, built on Lucene 5.4.1, has been released as a bug fix update and is available on the Elastic Cloud platform. This update addresses several key issues, including the Tribe node's failure to pass relevant settings to client nodes, Marvel's inability to export data to remote monitoring clusters when Shield was enabled, the _aliases endpoint ignoring configured filters, and the GCE plugin failing due to insufficient privileges. Users experiencing these issues are encouraged to upgrade and provide feedback via Twitter or the forum, with any problems being reportable on the GitHub issues page.