Bug Fixes

• #12234 Resolved compatibility issues with Open Telemetry configurations defined in emqx.conf from versions before EMQX 5.4.0, ensuring smooth integration of legacy configurations with the latest EMQX release.

• #12236 Fixed client ID generation in MQTT broker data integration to comply with MQTT 3.1 specification of 23-byte limit. Client ID is now prefixed with user-assigned connector name, followed by the first 8 bytes of node name's SHA hash and pool member ID. If the resulting ID exceeds 23 bytes, additional SHA hash and truncation are applied to ensure compliance.

• #12238 Resolved compatibility issue with the error format configurations introduced in the HTTP Action feature of EMQX version 5.3.2.

• #12246 Stopped exposing port 11883 by default in Docker and removed it from Helm charts, as this port is no longer in use.

• #12249 Fixed an issue in the /configs API where attempting to modify a read-only configuration value resulted in a garbled response message.

• #12264 Fix rolling upgrade when replica nodes join cluster with core nodes prior to version 5.4.