HiveMQ 4.28.4 Maintenance Release

The HiveMQ team is pleased to announce the availability of HiveMQ 4.28.4.

This maintenance release for the 4.28 series includes the following improvements:

HiveMQ Enterprise MQTT Broker

• Added metrics for the system, extension, and health group endpoints of the Health API that expose the health state of the broker as numeric values.
• Fixed an issue that could allow invalid packet IDs when using MQTT 3.
• Fixed an issue that could intermittently throw a Null Pointer Exception during broker startup when a Bridge extension in SUB mode is used.
• Fixed an issue that could cause an unnecessary error message to be logged during prolonged high memory usage.
• Fixed an issue that could prevent correct message delivery during a cluster topology change.
• Streamlined internal task management to increase efficiency and boost message throughput on larger machines.
• Improved request handling to reduce latency and CPU consumption.
• Improved message throughput for machines with multiple CPU cores.
• Improved resource usage to boost message throughput.
• Reduced end-to-end message latency and memory footprint to heighten broker efficiency.
• Improved script and schema handling to allow immediate deletion once all referenced policies are removed with no waiting period.
• Streamlined module instance handling to allow instances to be directly deleted without being first disabled.

HiveMQ Enterprise Security Extension

• Fixed an issue that could cause the REST API pipeline to return an incorrect WWW-Authenticate response header.
• Fixed an issue to ensure case-insensitive handling of request header names in the HTTP Headers preprocessor.

HiveMQ Enterprise Extension for Kafka

• Fixed an issue that incorrectly allowed extension configuration files with an invalid root tag.

HiveMQ Enterprise Extension for MongoDB

• Added new retry behavior for inserts that fail due to connection errors to avoid possible data loss.

MQTT CLI

• Added support for ARM-based platforms to the MQTT CLI container image.

Have a great day, The HiveMQ Team