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MySQL Router Release Notes  /  Changes in MySQL Router 8.0.37 (2024-04-30, General Availability)

Changes in MySQL Router 8.0.37 (2024-04-30, General Availability)

Bugs Fixed

  • If a hostname was not resolved, due to a DNS failure, MySQL Router did not check if that host became available again, later. (Bug #36246652)

  • MySQL Router's bootstrap process checks the mysql.user table for the unsupported mysql_native_password authentication plugin. If the bootstrap user had no access to the table, the following error was returned:

            Failed checking the Router account authentication plugin: Error executing MySQL query "select host, plugin from mysql.user where user = 
            'user'": SELECT command denied to user 'user'@'host' 
            for table 'user' (1142)

    As of this release, this error is not returned. (Bug #36225456)

  • The following error was displayed if MySQL Router was closed before the metadata cache started:

            Error: routing:_: Metadata Cache not initialized

    (Bug #36151125)

  • If an incoming port is opened and closed by a TCP connection, such as a load balancer or a service-monitoring utility performing a health check, the connection counts towards the limit defined by max_connect_errors, even though the connection was not established. This could lead to MySQL Router closing the incoming port when the error limit is reached.

    As of this release, max_connect_errors is not incremented if the Router's incoming port is opened and closed without establishing a connection. (Bug #36104070)

  • The following error did not provide enough information for troubleshooting:

            timestamp routing ERROR [code] connecting to backend  failed: Connection timed out (generic:110)

    As of this release, it contains the following details:

    • Route name and client source.

    • resolve() errors.

    • Hostname, IP addresses, and errors for each connection attempt.

    • The amount of time spent on the connection attempt.

    (Bug #35503245)