After the peer shuts down, you have 60 seconds (by default) to complete any maintenance work and bring the peer back online. If the peer does not return to the cluster within this time, the master initiates bucket-fixing activities to return the cluster to a complete state. It does not start bringing peers online ... Also, when maintenance mode is enabled, restart_timeout doesn't matter since maintenance mode avoid any bucket fixup activity. ... View more

""After the peer shuts down, you have 60 seconds (by default) to complete any maintenance work and bring the peer back online. If the peer does not return to the cluster within this time, the master initiates bucket-fixing activities to return the cluster to a complete state. If you need more time, you can extend the time that the master waits for the peer to come back online by configuring the restart_timeout attribute"" But why does "restart_timeout" matter here ? when you are already putting cluster into maintenance mode which does not allow any bucket fixup activity. ... View more