This is the file where we do some zookeeper set up: onpremise/set-up-zookeeper.sh at a95b9fa011ebf3d8fb0fcd6e20d35527c72911cf · getsentry/onpremise · GitHub
You can try running it standalone via
source install/_lib.sh
source set-up-zookeeper.sh
and see if you get any useful errors.