3256
MySQLERRORNotableReplicationHIGH confidence
CHANGE REPLICATION FILTER is prohibited
Production Risk
Medium — command rejected; apply during a scheduled maintenance window.
How to reproduce
trigger — this will error
trigger — this will error
CHANGE REPLICATION FILTER REPLICATE_DO_DB=(mydb);
expected output
ERROR 3256 (HY000): CHANGE REPLICATION FILTER cannot be executed when there are running replication threads.
Fix
Stop replica threads first
Stop replica threads first
STOP REPLICA; CHANGE REPLICATION FILTER REPLICATE_DO_DB=(mydb); START REPLICA;
Why this works
All replication threads must be stopped to safely modify filters.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3256 ER_CHANGE_REPLICATION_FILTER_PROHIBITED
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