Release Notes

This update fixes several regressions that were deemed significant enough to be backported to the release branch. In addition, the experimental feature to set system variables is now behind a flag that disables it by default.

Configuration Changes

• Vtgate: added flag enable_system_settings to enable passthrough system settings, defaults to false #6562

Bugs Fixed

• Vreplication: Materialize should only get schema from source tablets if target is missing tables #6623
• Vtctld UI: mysql port is not displayed in tablet list #6597 #6600
• Vtgate: transaction killer was closing reserved connection after the specified time. Only idle connections should be closed. Idle transactions should be rolled back. #6583
• Vtcompose: docker-compose example was broken by tabletmanager changes #6587
• Vreplication: tablet_picker should respect canceled context. Also, keep trying to find a tablet until context expires. #6567
• Vtgate: vindex update/delete by destination #6541 #6572
• Vtgate: some usages of EXPLAIN were broken #6574 #6581
• Vtgate: handle multiple settings in single SET statement #6504
• Vtgate: cleanup shard session for reserved connection on failure #6563
• Vtgate: if executing DDL on reserved connection, start transaction if needed #6555
• Vtgate: make sure lookup vindexes use same transaction if one is open #6505
• Healthcheck: add diagnostic logging, do not add tablet if it is shutting down #6512