HiveMQ 4.9.8 Maintenance Release

The HiveMQ team is pleased to announce the availability of HiveMQ 4.9.8.

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

HiveMQ Enterprise MQTT Broker

• Added listener type and port information to HiveMQ event log entries generated by SSL errors and ungraceful disconnects.
• Fixed a race condition that could interfere with cluster state lookups and potentially cause delays in the application of cluster topology changes.
• Fixed a race condition that could prevent correct adjustment of the overload protection levels when a node leaves the cluster.
• Fixed a race condition that could cause an overloaded or temporarily sluggish node to be removed from the cluster unnecessarily.
• Fixed reliability issues that arise when the process of a new node joining a cluster overlaps with the shutdown process of another node.
• Fixed an issue that could cause queued packets to be incorrectly marked as expired in some rare cases.
• Fixed an issue that some Rest API error responses were not in the expected JSON format.

HiveMQ Enterprise Extension for Kafka

• Added a limit to restrict the number of warning log messages the extension generates when a transformer fails to forward a message.

HiveMQ Enterprise Security Extension

• Fixed a wrong foreign key constraint in the rest_api_user_permissions table in the MySQL DDL script mysql_create.sql.

HiveMQ Swarm

• Added a metric to HiveMQ Swarm’s Commander to monitor the progress of the current scenario.
• Added a metric to HiveMQ Swarm’s Commander to monitor the amount of connected Agents.

Have a great day, The HiveMQ Team

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