Hi guy, I have two database server used the Replication + MHA + MaxScale . When the master(mdb1) went down ,I had select "show slave status" on slave(mdb2) , the slave database show "No query specified". So I can sure the slave database was be a master database. I had used maxscale commad "list servers" to show servers status : that show the mdb1 was down and mdb2 was runnung . But I can't connect to mysql via Maxscale, I got an error message : failed to create new session . How to use the Maxscale in two server replication ? The minimum database server node of MaxScale are 3 servers ?