The problem is that somehow the thd_get_durability_property() function was
introduced into MariaDB code, but it is completely non-functional. So now
there is code in InnoDB, TokuDB and RocksDB that calls this function and
does not work correctly. This lead to performance regression due to extra
fsync() calls.
Or was the intention to eventually replace the whole MariaDB binlog group
commit implementation with the MySQL one, to make MariaDB less divergent?
This would require a number of changes to MariaDB binlog and replication.