Elasticsearch 1.5.0 has been released, featuring significant resiliency improvements and bug fixes, along with two experimental features: Inner Hits and Shadow Replicas. Inner Hits allow users to return child documents that match a query alongside their parent documents, enhancing the search functionality in nested or parent-child queries. Shadow Replicas enable scaling of search throughput by using distributed file systems for redundancy instead of making multiple copies of each shard. The update also addresses various issues from previous versions, including corrupt indices detection, improved shard management, and enhanced checksum validation, ensuring a more robust and reliable system. Users are encouraged to upgrade for these enhancements and to provide feedback on their experiences.