I cannot connect to HBase running in Docker on Windows (banno/hbase-standalone image). However, I can connect to locally installed HBase.
banno/hbase-standalone image is
Try add [boot2docker IP] a3e6c240af20 instead of 127.0.0.1 because HBase Java client needs to reach your docker's host not exactly localhost to reach zookeeper (CMIIW). Not pretty sure if it will works but it works in my Windows.
[boot2docker IP] a3e6c240af20
127.0.0.1
docker's host
localhost