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Problem when changing replication user password

emincote asked
Last Modified: 2016-01-07
Dear Experts,

I am running MySQL 5.5 replication environment and I need to change the password on the replication user.  I have tried the following:

stop slave
change passwords on master and slaves
start slave

I then get an error connecting to master when I run 'show slave status'.  If I repeat the process setting the password back to the original one, then replication all starts again perfectly.  What have I missed.

As a secondary question, which order should I update versions of MySQL.  Master then slaves or the other way round?

Many thanks

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