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https://dev.mysql.com/doc/mysql-router/9.7/en/mysql-router-upgrading.html
MySQL Router logs indicate if existing metadata is incompatible with the new version with an error, such as: This version of MySQL Router is not compatible with the provided MySQL InnoDB cluster metadata Bootstrapping Router after installing a new ... MySQL Router as a part of InnoDB Cluster MySQL Router is most commonly used as an InnoDB Cluster component; with Router bootstrapped against the ...
https://dev.mysql.com/doc/mysql-router/9.7/en/router-read-replicas.html
An error is returned for any attempt to bootstrap with a Read Replica. MySQL Router reads the values defined in the metadata field, v2_router_options.router_options.read_only_targets, to retrieve routing information for read-only traffic.
https://dev.mysql.com/doc/mysql-router/9.7/en/router-read-write-splitting-statements.html
Such statements fail with an error similar to the following The MySQL server is running with the --super-read-only option so it cannot execute this statement. The following describes read-only statements: Statements are read-only if they start ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/add-instances-cluster.html
Group Replication implements compatibility policies which consider the version of the instances, and the Cluster.addInstance() operation detects this and in the event of an incompatibility the operation terminates with an error. You need a minimum ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/admin-api-connect-primary.html
If the target instance does not belong to a cluster or ReplicaSet the operation fails with an error. When you are working with a single-primary InnoDB Cluster or an InnoDB ReplicaSet, you need to connect to the primary instance for administration ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/admin-api-routing-guidelines-creating-activating.html
If any router is incompatible with the new guideline, an error is returned listing the incompatible routers. Create Routing Guidelines using the following command: object.create_routing_guideline(name[, json[, options]]) object: the Cluster, ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/check-instance-configuration.html
The action field in the config_error section of the report tells you whether MySQL on the instance requires a restart to detect any change made to the configuration file. Before creating a production deployment from server instances you need to ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/configuring-production-instances.html
If the target instance already belongs to an InnoDB Cluster an error is generated and the process fails. AdminAPI provides the dba.configureInstance() function that checks if an instance is suitably configured for InnoDB Cluster usage, and ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/data-type-handling.html
If there is an expected data type for the parameter and you specify a different data type, an error is raised. In general, the data type of an argument is resolved using the following criteria, in order of priority: The expected data type for the ...
https://dev.mysql.com/doc/mysql-shell/9.7/en/innodb-clusterset-dissolve.html
If any instance is unreachable, the operation fails, generating an error. This section describes how to dissolve a ClusterSet using ClusterSet.dissolve(). ClusterSets are dissolved in the following way: Replication accounts are dropped from all ...