# 3.16.2 Release Notes Squirro 3.16.2 was released on June 25, 2026. Learn more about the [Squirro Release Process](../squirro-release-process.md#getting-squirro-process) page. > **Notes for administrators** > > This release introduces important changes that may require adjustments to your existing setup. [Learn more](#breaking) ## Improvements ### AI - Maximum Questions and Maximum Concurrent Questions settings in the Batch Q&A widget, with rolling-window answer generation that immediately starts the next queued question when a slot frees up, and a `Queued` state for questions awaiting their turn. - `frontend.sqgpt.max-upload-files` project configuration to set the maximum number of files a user can attach to the Squirro Chat widget upload. - Open References in a New Tab option in the Chat widget, which opens a chat answer reference in the Document Details in a new browser tab instead of the in-app item detail modal. - File type check when uploading files for Chat with Document. ### Search - Lucene-style `[a TO b]` range query syntax. - In Document Search now supported for HTML items in the Document Details side panel, in addition to PDFs. - Faster language detection for natural-language queries. ## Bug Fixes - Ingestion pipeline failing validation in the Rhein data loader plugin when the `lastModifiedDate` or `createdDate` facet was mapped to a Squirro system field, blocking item removal across all batch types. - Non-extractable file types not handled in the SharePoint data loader plugin. - “No available connectors” message when creating a new data source in a new containerized deployment. - `topic` service failing to start in fully containerized deployments with limited or no outbound internet access. ## Breaking Change Removal of the Squirro Cluster Service (`sqclusterd`) and all related logic, configuration (`cluster.ini`, the `endpoint_discovery` and `db_endpoint_discovery` settings), monitoring integration, and packaging. Multi-node deployments that relied on the cluster service for MySQL and Redis endpoint discovery and replication management are no longer supported as of Squirro 3.16.2. ## Installation and Upgrade For new installations, find step-by-step instructions on the [Install and Manage Squirro with Ansible](../../install/ansible/index.md#ansible) page (recommended) and [Installing Squirro on Linux](../../install/linux.md#install-linux) pages. To upgrade an existing installation, see the [Upgrading Squirro](../../install/upgrade.md#install-upgrade) page.