You don't want the a balancer to move a region to a region server you're about to close. And a rolling restart is stressful enough on the system; minimizing any extra noise is safer. But when a region server dies, its regions are reallocated, whatever the balancer settings.
On Thu, Dec 27, 2012 at 4:09 PM, Adrien Mogenet <adrien.moge...@gmail.com>wrote: > Are you sure ? So why is the balancer disabled before rolling restart ?
