Releases

v5.2.0

Enhancements

• #11469 Added support for specifying username in Redis authentication.
• #11487 The bcrypt work factor is limited to the range 5-10, because higher values consume too much CPU resources. Bcrypt library is updated to allow parallel hash evaluation.
• #11496 Disabled the Erlang VM Prometheus exporter by default to improve performance and security.
• #11497 Enhanced broker metrics collection and export by adding new metrics for messages, overload protection, authorization, and authentication, and also by improving naming consistency for OpenTelemetry.
• #11490 Added fast error handling for undefined passwords in various authentication backends. This improves the consistency and user-friendliness of the authentication process.
• #11532 Improved error messaging for better clarity when parsing invalid packets.
• #11568 Added support for defining templates for MQTT 5.0 publish properties and user properties in Republish rule action.

Bug Fixes

• #11466 Fixed a crash that occurred when setting the ssl_options.ciphers configuration option to an empty string ("").

• #11480 Improved the error handling and testing of SQL functions in the rule engine when rule functions received bad arguments.

• #11493 Fixed response examples for /api/v5/publish bad request in RESP API documentation. Previously the documentation example said that the bad request response could return a list in the body which was not actually the case.

• #11506 Previously, attempting to download a non-existent trace log file would result in downloading an empty file. After implementing this fix, when attempting to download an empty trace log file using the GET request /api/v5/trace/clientempty/download, the server will now respond with a 404 status code and the following JSON message: {"code":"NOT_FOUND","message":"Trace is empty"}. This response will be triggered if no events matching the trace condition are found in the log file.

• #11520 Fixed an issue where packets_connack_sent metric was not incremented on CONNACK packets sent with non-zero ack_flag.

• #11522 Improved rule engine schema registry error message when schema name exceeds the permissible length.

• #11523 Corrected a misleading prompt when specifying invalid certificates/keys for the /configs API.

• #11531 Fixed an issue where authorization cache cleaning CLI was not working properly for specific client ID.

• #11534 Fixed the increment on data bridge statistics when the bridge is unhealthy. Now, messages sent to unhealthy bridges are counted as dropped messages.

• #11540 Improved HTTP response when attempting to create a bridge with an invalid name.

• #11548 Fixed an issue that prevented the plugin order from being updated across the entire cluster.

• #11564 Fixed cluster partition autoheal functionality. Implemented autohealing for the clusters that split into multiple partitions.

• #11568 Fixed an issue where an ill-defined built-in rule action config could be interpreted as a custom user function.

• #11586 Fixed an issue that could lead to crashes during session takeover when rolling upgrading from a previous version to v5.2.0.