HiveMQ 4.9.10 Maintenance Release

The HiveMQ team is pleased to announce the availability of HiveMQ 4.9.10.

This maintenance release for the 4.9 series includes the following improvements:

HiveMQ Enterprise MQTT Broker

• Improved scaling of the cluster threads used for scheduled tasks based on the instance size to provide increased efficiency.
• Reduced the number of retransmission requests in the cluster transport during periods of high load.
• Fixed an issue that could negatively impact CPU usage during the collection of client session and subscription metrics.
• Reduced heap pressure during topology changes for nodes with a high number of client connections.
• Reduced heap pressure during periodic cleanup tasks.
• Improved observability during OCSP stapling for cases in which a Java KeyStore lacks an issuer certificate.
• Fixed an issue that could cause the client queue for QoS 2 messages to stall when the internal inflight PUBREL configuration is enabled.
• Added system metrics for HiveMQ process uptime and remaining disk space to provide increased observability and deeper insights.
• Introduced numerous additional system metrics to provide increased observability and deeper insights.
• Fixed a race condition that could cause incorrect subscription metrics.

HiveMQ Enterprise Security Extension

• Improved the performance of SQL authorization managers that use REST API permissions.

Have a great day, The HiveMQ Team