Contract record
MySQL 8.4 LTS removed syntax and authentication defaults
MySQL 8.4 is an LTS boundary with removed replication syntax, disabled legacy authentication paths, and upgrade-track traps that agents often misrepair.
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Use this parent record for broad searches about the version change. Use a child repair page when the error, integration, runtime, or verification path is specific.
Child Repairs
MySQL 8.4 LTS repository 9.x Innovation repository track officialDatabase version contract drift · 15 observed queries
MySQL 8.4 InnoDB default changes innodb_dedicated_server innodb_buffer_pool_instances defaultDatabase operational contract · 13 observed queries
go-sql-driver mysql caching_sha2_password TLS RSA public key allowPublicKeyRetrieval MySQL 8.4Database version contract drift · 10 observed queries
MySQL 8.4 Connector/J Public Key Retrieval is not allowed allowPublicKeyRetrieval official documentationDatabase version contract drift · 10 observed queries
MySQL 8.4 mysql_native_password disabled default authentication plugin caching_sha2_password documentationDatabase version contract drift · 8 observed queries
MySQL 8.4 STOP REPLICA STOP SLAVE syntax official documentationDatabase version contract drift · 8 observed queries
MySQL 8.4.1 cannot restart after creating 8001 tablesDatabase operational contract · 8 observed queries
MySQL 8.4 mysql_native_password disabled authentication plugin PHP PDO unknown authentication method officialDatabase version contract drift · 7 observed queries
MySQL 8.4 CHANGE MASTER TO removed replica bootstrap script fails before replication startsDatabase operational contract · 7 observed queries
MySQL 8.4 CHANGE REPLICATION SOURCE TO SOURCE_HOST SOURCE_AUTO_POSITION MASTER_HOST deprecated removedDatabase operational contract · 7 observed queries
MySQL 8.4 group_replication_exit_state_action default OFFLINE_MODEDatabase operational contract · 7 observed queries
MySQL 8.4 START SLAVE removed syntax error START REPLICA official docsDatabase operational contract · 7 observed queries
MySQL 8.4 replication caching_sha2_password GET_SOURCE_PUBLIC_KEYDatabase version contract drift · 6 observed queries
MySQL 8.4 partition key indexed column prefix rejected CREATE ALTER TABLE warning errorVersioned API schema · 6 observed queries
MySQL 8.4.1 restart outage withdrawn 8.4.1 only deployments pulled during availabilityDatabase operational contract · 5 observed queries
MySQL 8.4 mysql_native_password disabled by default authentication plugin cannot be loaded officialDatabase version contract drift · 4 observed queries
MySQL 8.4 reference manual upgrade paths 5.7 8.4 unsupportedDatabase version contract drift · 4 observed queries
MySQL 8.4 RESET MASTER removed RESET BINARY LOGS AND GTIDS official documentationDatabase version contract drift · 4 observed queries
MySQL 8.4 SHOW SLAVE STATUS removed SHOW REPLICA STATUS documentationDatabase metric/command drift · 4 observed queries
MySQL 8.4 upgrade from MySQL 5.7 direct upgrade supported 8.0 intermediate officialDatabase operational contract · 4 observed queries
MySQL 8.4 mysql_native_password disabled by default authentication plugin error official documentationDatabase auth/default · 3 observed queries