[rabbitmq-discuss] upgrade from rabbitmq 2.7.1 to rabbitmq 2.8.1

[Eslam Mamdouh]

Hi All,
i have two production servers in rabbitmq cluster "disk nodes"

rabbitmqctl cluster_status
> Cluster status of node rabbit at ga1 ...
> [{nodes,[{disc,[rabbit at ga2,rabbit at ga1]}]},
>  {running_nodes,[rabbit at ga2,rabbit at ga1]}]
> ...done.
>
>
with rabbitmq-server version 2.7.1-1 and i'd like to upgrade them to 
rabbitmq-server version 2.8.1-1

i tried to upgrade first node from 2.7.1-1 ot 2.8.1-1 but it didn't join 
rabbitmq cluster due to difference in rabbitmq-server versions

any recommendations regarding this issue ?

Thanks in adnavce 

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