@jerry shen. Something seems to be off in your setup. Mostly what is confusing me is that you don't have a default.xml file. In any case, I think I did find an issue with the sandbox setup. I imported the sandbox like you said and turned off maintenance mode and started HBase, Knox and the Demo LDAP. In addition to that I started the REST server for Hbase. As of now this is unfortunately not something you can do in Ambari so you will need to ssh to the box and execute something like this: {HBASE_BIN/hbase-daemon.sh start rest -p 60080 As is described here: http://knox.apache.org/books/knox-0-11-0/user-guide.html#HBase Now once the REST server is running you can execute 'curl http://localhost:60080' like you originally said. Now coming to the issue. I see that in Ambari the wrong port is getting set for the service. If you go into Ambari and the Knox service's 'Configs' tab. Expand on the section "Advanced Topology" and scroll to the <service> xml section for WEBHBASE. You should see this: <service> <role>WEBHBASE</role> <url>http://{{hbase_master_host}}:{{hbase_master_port}}</url> </service> That value is getting saved to the topology file 'default.xml' as this (which is the wrong port): <service> <role>WEBHBASE</role> <url>http://sandbox.hortonworks.com:8080</url> </service> You want it to look like this: <service> <role>WEBHBASE</role> <url>http://sandbox.hortonworks.com:60080</url> </service> So the easiest thing to do right now in the sandbox you are using would be to change it in that 'Advanced Topology" section and save it to: <service> <role>WEBHBASE</role> <url>http://{{hbase_master_host}}:60080</url> </service> Remember to restart Knox from Ambari after this. If you can validate the default.xml file on disk in this entire process it would be useful. Please note: the path for me on the sandbox VM for the topology file was /usr/hdp/2.5.0.0-1245/knox/conf/topologies/default.xml The path for HBase bin for me was /usr/hdp/2.5.0.0-1245/hbase/bin/ and the curl command to use in the end is: curl -ik -u guest:guest-password -H "Accept: text/xml" -X GET 'https://localhost:8443/gateway/default/hbase' ... View more