MySQL cannot join or start Group Replication because the server lacks mandatory Group Replication settings or plugins.
MySQL ER_GROUP_REPLICATION_CONFIGURATION appears when a node misses essential Group Replication settings like a unique server_id, GTID mode, or the group_replication plugin. Enable GTID_MODE, set a distinct server_id, install the plugin, configure replication channels, and restart the instance to resolve the issue.
ER_GROUP_REPLICATION_CONFIGURATION
MySQL raises ER_GROUP_REPLICATION_CONFIGURATION when the instance attempts to start or join Group Replication without the required configuration. The server halts the group_replication plugin and writes error 3092 to the log.
This defensive stop protects data integrity because an improperly configured node could corrupt the distributed transaction history. Fixing the underlying settings is critical before re-enabling the plugin.
A node that cannot join the group leaves your cluster under-replicated and vulnerable to outages. Production deployments rely on quorum and automatic failover, so resolving 3092 quickly maintains high availability.
Ignoring the error can also mask deeper issues such as mismatched GTID sets or binary logging gaps that threaten future recovery operations.
Most occurrences trace to missing prerequisites: GTID_MODE not ON, no unique server_id, or binary logging disabled. The plugin checks these variables at startup and aborts if any are incorrect.
Other triggers include incorrect group_replication_group_name, mismatched SSL settings between members, or insufficient privileges for the replication user.
Correct configuration variables, load the group_replication plugin, create a replication user, and restart the instance. Detailed steps appear in the next section with tested SQL.
After all prerequisites are satisfied, START GROUP_REPLICATION should complete without errors and the node will appear in performance_schema.replication_group_members.
Single-primary clusters often fail when a new node is cloned but not given a unique server_id. Multi-primary topologies frequently surface 3092 because GTID consistency was disabled during bulk loads.
Edge cases on cloud hosts arise when binary logging is turned off to save I/O costs, blocking Group Replication completely.
Automate configuration via Ansible or Terraform modules that enforce GTID_MODE=ON and server_id uniqueness. Include validation tests in CI pipelines that run SHOW VARIABLES checks before promotion.
Galaxy users can embed these checks in pre-run snippets so every query window verifies Group Replication health before deploying DDL.
Galaxy collections let teams save the exact START GROUP_REPLICATION commands and share them with role-based permissions. Versioned SQL snippets ensure all engineers use the same, vetted configuration steps.
The AI copilot can inspect mysqld variables and suggest the missing settings automatically, speeding up root-cause analysis of error 3092.
Group Replication requires every node to advertise a unique integer server_id. Cloned instances often keep the donor's value, triggering 3092.
Global transaction identifiers must be enabled so the group can certify writes. GTID_MODE=OFF or OFF_PERMISSIVE causes an immediate plugin abort.
log_bin must be active for the plugin to exchange transactions. A disabled binary log stops replication startup.
group_replication.so must be loaded via INSTALL PLUGIN or plugin_load_add. Missing libraries raise configuration errors.
All members must share the exact UUID group name. Typos prevent handshake and produce 3092 in error logs.
Raised when a Group Replication SQL command fails during execution rather than configuration.
Indicates that a running member left the group, often due to network or flow control issues.
Shows problems during state transfer from donor to joining node.
Signals an internal applier thread initialization failure, distinct from configuration checks.
Yes. Group Replication depends on GTIDs for conflict detection. Set GTID_MODE and enforce_gtid_consistency to ON before starting the plugin.
No. log_bin must be enabled because transactions are streamed through binary logs. Disabling it triggers error 3092.
Choose any positive integer that is unique across the cluster. Many teams align IDs with host numbers to avoid duplicates.
Galaxy's AI copilot can run SHOW VARIABLES and highlight missing settings, helping you resolve error 3092 faster.
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