# MySQL Replication fails periodically

**URL:** <https://forum.inductiveautomation.com/t/mysql-replication-fails-periodically/11739>\
**Category:** Archived Topics\
**Created:** [May 27, 2016, 7:38pm UTC](https://forum.inductiveautomation.com/t/mysql-replication-fails-periodically/11739 "2016-05-27T19:38:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Caleb\_Bohon](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/caleb_bohon/32/3293_2.png) [@Caleb\_Bohon](https://forum.inductiveautomation.com/u/Caleb_Bohon)\
**Post date:** [May 27, 2016, 7:38pm UTC](https://forum.inductiveautomation.com/t/mysql-replication-fails-periodically/11739/1 "2016-05-27T19:38:58Z")

</div>

Hi,

I am working on a fully redundant Ignition and MySQL system, but it seems to fail if one of the servers is turned off too long.

Both machines have:  
Windows 7 Pro  
Ignition 7.8.2  
MySQL 5.7.12 Community Server

I have Ignition installed with redundancy working, but turn off the Ignition service while setting up the SQL replication.

I have MySQL installed on both servers with master-master replication setup according to this:

[ryadel.com/en/mysql-master-m … asy-steps/](http://www.ryadel.com/en/mysql-master-master-replication-setup-in-5-easy-steps/)

I confirmed that replication is running then I start the Master Ignition service.

It seems to fail if one of the computers is off for too long.

Has anyone done this successfully?

Edited to add:

Moved to Database board.