Error message:

debezium io.debezium.text.ParsingException: DDL statement couldn't be parsed. Please open a Jira issue with the statement 'FLUSH FIREWALL_RULES'

I tried also to add 

"database.history​.skip.unparseable​.ddl" : true

in connector config, but it has no effect.

Using:

 docker image: debezium/connect:1.6.1.Final

Db:

mysql : Azure Database for MySQL server v5.7

The operation which caused the statement is probably granting permission to a mysql user.

Thanks !