Aurora MySQL database engine updates 2021-03-18 (version 1.23.2) - Amazon Aurora

Aurora MySQL database engine updates 2021-03-18 (version 1.23.2)

Version: 1.23.2

Aurora MySQL 1.23.2 is generally available. Aurora MySQL 1.* versions are compatible with MySQL 5.6 and Aurora MySQL 2.* versions are compatible with MySQL 5.7.

Currently supported Aurora MySQL releases are 1.19.*, 1.20.*, 1.21.*, 1.22.*, 1.23.*, and 2.04.*, 2.05.*, 2.06.*,2.07.*, 2.08.* and 2.09.*. You can restore the snapshot of an Aurora MySQL 1.* database into Aurora MySQL 1.23.2.

To create a cluster with an older version of Aurora MySQL, specify the engine version through the RDS Console, the AWS CLI, or the Amazon RDS API.


This version is currently not available in the following regions: AWS GovCloud (US-East) [us-gov-east-1], AWS GovCloud (US-West) [us-gov-west-1]. There will be a separate announcement once it is made available.

If you have any questions or concerns, AWS Support is available on the community forums and through AWS Premium Support. For more information, see Maintaining an Amazon Aurora DB cluster.


High priority fixes:

Availability improvements:

  • Fixed an issue in the dynamic cluster storage resizing feature that could cause reader DB instances to restart.

  • Fixed a failover issue due to a race condition in RESET QUERY CACHE statement.

  • Fixed a crash in a nested stored procedure call with query cache.

  • Fixed an issue to prevent repeated restart of mysqld when recovering from an incomplete truncation of partitioned or sub-partitioned tables.

  • Fixed an issue that could cause migration from on-prem or RDS for MySQL to Aurora MySQL to not succeed.

  • Fixed a rare race condition where the database can restart during the scaling of the storage volume.

  • Fixed an issue in the lock manager where a race condition can cause a lock to be shared by two transactions, causing the database to restart.

  • Fixed an issue related to transaction lock memory management with long-running write transactions resulting in a database restart.

  • Fixed a race condition in the lock manager that resulted in a database restart or failover during transaction rollback.

  • Fixed an issue during upgrade from 5.6 to 5.7 when the table had Fast Online DDL enabled in lab mode in 5.6.

  • Fixed multiple issues where the engine might restart during zero-downtime patching while checking for a quiesced point in database activity for patching.

  • Fixed multiple issues related to repeated restarts due to interrupted DDL operations, such as DROP TRIGGER, ALTER TABLE, and specifically ALTER TABLE that modifies the type of partitioning or number of partitions in a table.

  • Updated the default value of table_open_cache on 16XL and 24XL instances to avoid repeated restarts and high CPU utilization on large instances classes (R4/R5-16XL, R5-12XL, R5-24XL). This impacted 1.21.x and 1.22.x releases.

  • Fixed an issue that caused a binlog replica to stop with an HA_ERR_KEY_NOT_FOUND error.

Integration of MySQL community edition bug fixes

  • Replication: While a SHOW BINLOG EVENTS statement was executing, any parallel transaction was blocked. The fix ensures that the SHOW BINLOG EVENTS process now only acquires a lock for the duration of calculating the file's end position, therefore parallel transactions are not blocked for long durations. (Bug #76618, Bug #20928790)