HiveMQ 4.9.12 Maintenance Release

HiveMQ 4.9.12 Maintenance Release

author HiveMQ Team

Written by HiveMQ Team

Category: HiveMQ Release

Published: October 10, 2023

The HiveMQ team is pleased to announce the availability of HiveMQ 4.9.12.

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

HiveMQ Enterprise MQTT Broker

  • Added log statements to provide greater visibility for failure detection states to facilitate testing and debugging.
  • Fixed an issue that could cause incorrect metric incrementation when a node repeatedly leaves and joins a two-node cluster.

HiveMQ Enterprise Extension for Google Cloud Pub/Sub

  • Fixed an issue that could cause a QoS 0 PUBLISH message to be unnecessarily resent to Google Cloud PubSub after the initial delivery attempt fails.


  • Added DEBUG level log statements for MQTT 5 SUBACK, PUBACK, PUBREC, PUBREL, and PUBCOMP acknowledgment packets.
  • Fixed an issue that could prevent MQTT CLI connection to a secured broker.
  • Fixed an issue in the help description for the default TLS protocol version that could cause the formation of an incorrect command.

Get HiveMQ 4.9.12 now

Have a great day, The HiveMQ Team

author HiveMQ Team

About HiveMQ Team

We love writing about MQTT, IoT protocols and architecture in general. Our experts are here to help, so reach out to us if we can help!

mail icon Contact HiveMQ
newer posts What’s New in HiveMQ 4.21?
HiveMQ Community Edition 2023.8 is released older posts