3254
MySQLERRORNotableReplicationHIGH confidence
Replication SQL thread delay option is not supported
Production Risk
Low — command is rejected; replication continues unchanged.
How to reproduce
trigger — this will error
trigger — this will error
CHANGE REPLICATION SOURCE TO SOURCE_DELAY=1800;
expected output
ERROR 3254 (HY000): This operation cannot be performed with a running replication SQL thread.
Fix
Stop SQL thread first
Stop SQL thread first
STOP REPLICA SQL_THREAD; CHANGE REPLICATION SOURCE TO SOURCE_DELAY=1800; START REPLICA SQL_THREAD;
Why this works
Stopping the SQL thread allows the delay configuration to be modified safely.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3254 ER_REPLICATION_SLAVE_SQL_THREAD_DELAY
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