emqx4.3/changes/e5.2.1.en.md

e5.2.1

Enhancements

• #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.

• #11532 Improve some error reasons when parsing invalid packets.

• #11568 Added support for defining templates for MQTT 5.0 publish properties and user properties in Republish rule action.

• #11612 During node evacuation, evacuate all disconnected sessions, not only those started with clean_start set to false.

Bug Fixes

• #11493 Examples and documentation for /api/v5/publish bad request response have been fixed. Previously the documentation example said that the bad request response could return a list in the body which was not actually the case.

• #11499 Upgrade Erlang/OTP to 25.3.2-2

Erlang/OTP 25.3.2-2 excludes sensitive data from mnesia_hook log message.

• #11506 Don't download a trace log file if it is empty.

After this fix, GET /api/v5/trace/clientempty/download returns 404 {"code":"NOT_FOUND","message":"Trace is empty"} If no events matching the trace condition occurred.

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

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

• #11564 Fix cluster partition autoheal functionality. Implement 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.

• #11394 Upgrade Kafka producer client wolff from 1.7.6 to 1.7.7. This fixes a potential race condition which may cause all Kafka producers to crash if some failed to initialize.

• #11401 When running one of the rule engine SQL mongo_date functions in the EMQX dashboard test interface, the resulting date is formatted as ISODate(*), where * is the date in ISO date format instead of only the ISO date string. This is the format used by MongoDB to store dates.

• #11547 Fix several emqx_bridge issues:

  • fix Cassandra bridge connect error occurring when the bridge is configured without username/password (Cassandra doesn't require user credentials when it is configured with authenticator: AllowAllAuthenticator)
  • fix SQL Server bridge connect error caused by an empty password
  • make username a required field in Oracle bridge
  • fix IoTDB bridge error caused by setting base URL without scheme (e.g. <host>:<port>)

• #11630 Fixed an issue where the core node could get stuck in the mria_schema:bootstrap/0 state, preventing new nodes from joining the cluster.