Hi,   I am  a student on Ubuntu 18.04 LTS and was just trying to do the atlas tutorial in the HDP sandbox.   Unfortunately your software does not work: The Virtualbox VM just switches into "aborted" state, after a random amount of time The old docker image, does not allow me to start HBase The current docker image starts without any service initialized. Starting the services sometimes work, sometimes ambari just hangs and does not respond anymore. I received weird errors all over the place. E.g. Ambari says "HBase started successfully", but HBase is offline 3 seconds later. Or Ambari cannot access the "Metadata Server Web UI" (Bad Gateway). If i search through the atlas logs there are a ton of messages:     Call exception, tries=25, retries=36, started=330514 ms ago, cancelled=false, msg=Call to sandbox-hdp.hortonworks.com/172.18.0.2:16020 failed on connection exception: org.apache.hbase.thirdparty.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: sandbox-hdp.hortonworks.com/172.18.0.2:16020, details=row 'atlas_janus' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=sandbox-hdp.hortonworks.com,16020,1587723991480, seqNum=-1 (RpcRetryingCallerImpl:134)     I am trying to do the tutorial for 2 days now, but I always encounter error whatever I am trying to do. I though the sandbox is pre-setup to "just work preconfigured". ... View more