I'm wondering if there ever is a reason for solr to be in the root of a zookeeper install. Shouldn't it always be in some path inside '/'? In that case --zk being '/' would indicate a problem, either in configuration or in the user making a mistake, something you could alert on or even refuse to run.   Adding the prompt on --force would be a great step and I see the use of the -y option.          ... View more