I have one master and three slaves. Two of the slaves are in different remote sites. The third slave is in the same site as the master.
Recently upgraded to MySQL 5.7.11. Since then the two slaves in the different remote sites randomly get 'Reconnecting after a failed master event read'. It happens every one to two minutes and then reconnects within a minute.
Nothing is in the error log on the slaves or master. Logging verbosity is set to 3. Surely something should be logged? The issue does not occur on the slave in the same site as the master.
We've run reset master and reset slave on the slaves. Reset master on the master. Also we've run flush-hosts.
Any help or assistance would be greatly appreciated.