HiveMQ Community Edition 2021.3 is released

HiveMQ Community Edition 2021.3 is released

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Written by Yannick Weber

Category: HiveMQ CE

Published: November 19, 2021


The HiveMQ team is pleased to announce the availability of HiveMQ CE 2021.3.

This release provides plenty of great improvements and fixes:

✨ Improvements

  • Reduced the memory footprint of client connections
  • Avoid false-positive warnings when starting in embedded mode

🐞 Bug fixes

  • Fixed an issue that could cause a memory leak when clients are instantly disconnected after connecting
  • Corrected an issue that could cause an error during MQTT 3.1 client subscriptions
  • Adjusted handling of QoS level changes at the publish messages interceptor for increased stability
  • Significantly reduced Heap usage for use cases with high numbers of queued messages
  • Fixed a bug that caused wrong payloads after stateful start
  • Fixed an issue which could lead to multiple clients with the same id being connected after a take over
  • Fixed a bug which could lead to incorrect session take over behavior

ℹ️ Misc

  • Updated dependencies


You can find more information about and download the release on the GitHub release page.

You can get the embedded API as a Maven artifact from Maven Central, JitPack.

Be sure to check out the project on GitHub.

We recommend this upgrade for all HiveMQ Community Edition users.

Have a great day,

Yannick from the HiveMQ Team

author Yannick Weber

About Yannick Weber

Yannick is a software developer at HiveMQ and maintainer of the HiveMQ Testcontainer.
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