Hi All<br><br>I need to upgrade our current production 2.7.1 RabbitMQ cluster to it's new 2.8.1 version. <br><br>In our production cluster, we have 2 disc node and erlang R15B installed. According to the RabbitMQ cluster guilde:<br><br>"All nodes in a cluster must be running the same versions
of Erlang and RabbitMQ, although they may have different
plugins installed. Therefore it is necessary to stop all
nodes in the cluster, then start all nodes when performing
an upgrade."<br><br>In our case we cannot shutdown our existing cluster, because it is heavily used to send messages across regions. <br><br>Could someone please let me know how to upgrade 2.7.1 cluster without shutdown the entire cluster.<br><br>Many Thanks.<br>/Roshan<br>