I have setup the HDP Sandbox 2.3.2 under VirtualBox running on my Mac. I am able to interact with HBase from inside the VM without any problem. However, when I try to connect via Java from my host, the connection fails. I have forwarded port 16000 and created a "sandbox.hortonworks.com" entry in /etc/hosts (similar to this post). Here is my Java code: Configuration conf = HBaseConfiguration.create(); conf.set("fs.defaultFS", "hdfs://127.0.0.1:8020/"); conf.set("hbase.zookeeper.property.clientPort", "2181"); conf.set("hbase.zookeeper.quorum", "sandbox.hortonworks.com"); conf.set("zookeeper.znode.parent", "/hbase-unsecure"); HBaseAdmin.checkHBaseAvailable(conf); Update: A more helpful exception than the one below: Master is not running: org.apache.hadoop.hbase.MasterNotRunningException: The node /hbase is not in ZooKeeper. It should have been written by the master. Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master. Not sure why '/hbase' is being used, when I set "zookeeper.znode.parent" to "/hbase-unsecure" explicitly! Update #2: Running the code on the Sandbox gives exactly the same error. Any help? Old: and I get this exception: org.apache.hadoop.hbase.MasterNotRunningException: com.google.protobuf.ServiceException: org.apache.hadoop.hbase.exceptions.ConnectionClosingException: Call to sandbox.hortonworks.com/127.0.0.1:16000 failed on local exception: org.apache.hadoop.hbase.exceptions.ConnectionClosingException: Connection to sandbox.hortonworks.com/127.0.0.1:16000 is closing. Call id=0, waitTime=47 at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStub(ConnectionManager.java:1533) <snip> Any suggestions or help? Why would HBase be closing my connection? ... View more