This cluster contains multiple server versions and is running in 4.5 compatibility mode


#1

Hi ,
i have Upgraded bunch of different clusters from 4.5 to 5.1.1 ,but only one cluster there is something strange .
i see" This cluster contains multiple server versions and is running in 4.5 compatibility mode." i have upgraded all the nodes and all of them are in 5.1.1 .
can some please shed some light


#2

i just followed same steps on 5 different clusters. but only one cluster is behaving strange .


#3

I have followed below instrcutions from other ticket and resolved it.
my question is why i didn’t see this error in other cluster( i have did same change) ,but only this cluster has this warning.
This seems to be casused by read-only user. Unfortunately, 5.0.0 does not allow to remove it.

@RogerP What did work was:

  1. adding a new 4.5.0 node (docker) to the cluster (no rebalance),
  2. logging in on to 4.5.0 node and removing read-only user,
  3. canceling node add on 5.0.0 node.

I did not re-add the user since I no longer need it, but re-adding it after should work just fine.