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 brings together deep expertise in MQTT, Industrial AI, IoT data streaming, UNS, and Industrial IoT protocols. Follow us for practical deployment guidance, best practices for building a secure, reliable data backbone, and insights into how we are shaping the future of connected industries.

Our mission is to transform industrial data into real-time intelligence, actionable insights, and measurable business outcomes.

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