I have to setup a MySQL slave on an other infrasctructure. It will become the Master once that other infrasctructure is ready.

Mysql 5.6.29
Slave A in old infrasctructure
Slave B in new one

I dumped the Slave A database by performing a `STOP SLAVE;`, `FLUSH TABLES WITH READ LOCK` then the `mysqldump` and restarted the slave with `START SLAVE`.
I've now a perfect dump of my slave A with the master binlog and its position.

I dumped the dump into the Slave B and setup the correct binlog and position for the replication.
Once started, the Slave B couldn't find the binlog. But they are all in the right `/var/lib/mysql` folder on the Slave A. When I say they are all there I mean I put them myself in the folder in fact, otherwise they are deleted (I don't know why).

I really don't understand what I'm missing here.

`log-slave-updates` is ON on the Slave A