HiveMQ 4.4.1 released

Written by The HiveMQ Team

Category: HiveMQ Release

Published: September 2, 2020


The HiveMQ team is pleased to announce the availability of HiveMQ 4.4.1.

This maintenance release for the 4.4 series includes the following improvements:

  • Increased efficiency of client event replication during a cluster topology change when numerous clients are connected to the broker.
  • Improved handling of queued consumer messages after an ungraceful shutdown to ensure correct extension performance.
  • Corrected an issue that could prevent proper negative CONNACK acknowledgment when the identifier of a client is not set.
  • Refined process for accurate resumption of in-flight message publication to extensions after restart in a single-node deployment.
  • Fixed an exceptional arithmetic condition that can intermittently throw an ArithmeticException when a message is queued for a shared subscription during a cluster merge.
  • Adjusted behavior to ensure that publishing clients receive a PUBACK for all publishes during cluster topology changes.
  • Fixed an issue that could prevent further publication of messages when a PublishOutBoundInterceptor is used to drop messages.
  • Improved performance of clusters that undergo frequent topology changes around a consistent core.
  • Resolved an issue where a low message rate could occasionally cause an extension to cease message publication.
  • Improved handling of maximum keep alive for MQTT 5 clients.
  • Adjusted handling of empty client IDs for MQTT 3 clients.
  • Corrected enforcement of the maximum connection limit for clusters that use a CPU-based license.
  • Adjusted implementation of maximum topic length to ensure correct application of the restriction.
  • Fixed an issue where bridge clients did not provide correct credentials upon reconnect.
  • Enhanced logging functionality in the HiveMQ Enterprise Bridge Extension.
  • Fine-tuned HiveMQ startup behavior to wait for all extensions to load before accepting connections to ensure that all expected extension behavior can execute properly.
  • Added small improvements in areas such as message handling to boost overall HiveMQ performance.


Download HiveMQ 4.4.1 now

If you currently use HiveMQ 4.x, we recommend upgrading to version 4.4.1.

Have a great day, The HiveMQ Team

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