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Re: Error 1112 on Innodb to ndb replication
Posted by: Frazer Clement
Date: August 30, 2019 06:10AM

Hi Vasilis,
The errors you posted come from the Ndb storage engine.

Ndb does not currently support use cases where more than one replication channel is in use in a single MySQLD at a time, and that is what is being checked here, and causing the error.

MySQL Cluster replication generally assumes that replication will be using the 'built in' default channel, and if it detects that there is more than one channel defined then it refuses to operate.

It should be possible to see which channels you have configured by looking in the performance_schema tables :
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-tables.html

General replication channel info :
https://dev.mysql.com/doc/refman/8.0/en/replication-channels.html

Hope this helps,
Frazer

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