HiveMQ Enterprise MQTT Broker

Improved the scalability of messages sent to the same topic or topics with common prefixes, including subscriptions that use wildcards in their topic filters.

Added support for storing portions of the subscription index on disk to reduce memory usage when matching PUBLISH messages to subscribers.

Reduced the memory consumption per subscription.

Added a log file exporter that automatically includes relevant hivemq.log, event.log, and migration.log files in diagnostic archives.

HiveMQ Data Hub

Fixed an issue where large unsigned integers were not correctly parsed between Protobuf and JSON.

IMPORTANT: Starting with the next LTS version, Java 21 will be required to run the HiveMQ Platform.

We also recommend using Java 21 to run the current LTS line of the HiveMQ Platform.

If you use the official HiveMQ container images, no action is required – these images have shipped with Java 21 since HiveMQ 4.28.

Have a great day, The HiveMQ Team

HiveMQ Team

Team HiveMQ shares deep expertise in MQTT, Industrial AI, IoT data streaming, Unified Namespace (UNS), and Industrial IoT protocols. Our blogs explore real-world challenges, practical deployment guidance, and best practices for building modern, reliable, and a secure data backbone on the HiveMQ platform, along with thought leadership shaping the future of the connected world.

We’re on a mission to build the Industrial AI Platform that transforms industrial data into real-time intelligence, actionable insights, and measurable business outcomes.

Our experts are here to support your journey. Have questions? We’re happy to help. Contact us.