Release: Amazon IoT Greengrass Core v2.9.4 software update on February 24, 2023 - Amazon IoT Greengrass
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Release: Amazon IoT Greengrass Core v2.9.4 software update on February 24, 2023

This release provides version 2.9.4 of the Greengrass nucleus component.

Release date: February 24, 2023

Public component updates

The following table lists components provided by Amazon that include new and updated features.


When you deploy a component, Amazon IoT Greengrass installs the latest supported versions of all of that component's dependencies. Because of this, new patch versions of Amazon-provided public components might be automatically deployed to your core devices if you add new devices to a thing group, or you update the deployment that targets those devices. Some automatic updates, such as a nucleus update, can cause your devices to restart unexpectedly.

To prevent unintended updates for a component that is running on your device, we recommend that you directly include your preferred version of that component when you create a deployment. For more information about update behavior for Amazon IoT Greengrass Core software, see Update the Amazon IoT Greengrass Core software (OTA).

Component Details
Greengrass nucleus

Version 2.9.4 of the Greengrass nucleus is available.

Bug fixes and improvements
  • Checks for a null message before it drops QOS 0 messages.

  • Truncates job status detail values if they exceed the 1024 character limit.

  • Updates the bootstrap script for Windows to correctly read the Greengrass root path if that path includes spaces.

  • Updates subscribing to Amazon IoT Core so that it drops client messages if the subscription response wasn't sent.

  • Ensures that the nucleus loads its configuration from backup files when the main configuration file is corrupt or missing.