when you are trying to reset the password , if the LB tries to route traffic to that node then the requests will fail. Either you can move this node out of LB pool and let the other single node handle the traffic for time being or else carry on with password reset with out that as it should not take much time. It would depend on you, if you want absolutely no request to fail then move it out of LB pool and add it back once password is reset or carry on with password reset directly during the time when you less traffic.