Myloader doesn't create empty databases

Bug #1558164 reported by Charles Thompson on 2016-03-16
This bug affects 2 people
Affects Status Importance Assigned to Milestone
MySQL Data Dumper
Max Bubenick

Bug Description


Myloader isn't creating empty databases. I see the files there that would create the database but it seems like they're not being used.


Changed in mydumper:
status: New → Confirmed
assignee: nobody → Max Bubenick (max-bubenick)
milestone: none → 0.9.3
importance: Undecided → Low
Jaime Crespo (jynus) wrote :

How this can lead to an outage:

* Have a master with several databases, including one empty (e.g. a new application that is going to be deployed)
* Create a backup of the master
* Load into a replica, expecting to have an accurate copy of the master
* Setup replication -everything works as expected
* The application starts writing to the database
* Replication breaks because a missing database on the queries, including those that are not empty

This lead to a Wikimedia databases incident at

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