3223
MySQLERRORCommonReplicationMEDIUM confidence
Master info not found
Production Risk
High — replication cannot start.
Why it happens
- 1No replication source configuration exists for the replica.
- 2CHANGE MASTER TO was never run, or the configuration was reset.
How to reproduce
trigger — this will error
trigger — this will error
START REPLICA;
expected output
ERROR 3223 (HY000): Master info not found.
Fix
Configure replication source
Configure replication source
CHANGE MASTER TO MASTER_HOST='primary_host', MASTER_USER='repl', MASTER_PASSWORD='secret', MASTER_AUTO_POSITION=1;
Why this works
Establishes the connection parameters the replica needs to connect to the primary.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3223 ER_MASTER_INFO_NOT_FOUND
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