@pdarvasi, @George Meltser Hi, guys, Just wondering, is it easier to install hortonworks-sandbox-2.5 - ami-d278c1b2 first, then install Spark 2.2 on top of it? cause mostly I need are Spark 2.2 along with 1.6, for practice Or I better install a fresh sandbox-2.6 as the instructions? Or can I have a sandbox-2.6 in HDcloud without setting a multi-node cluster? instructions? Thanaks a lot Gary ... View more

Hi, I wanted to take HDPCD exam . .tried logging in AWS. but when i do hadoop fs -ls .. it throws connection refused. few times. Tried recreating the instance .. still the same error.. tried starting all the services individually in ambari ... still the same error. The above root@hostname isn't working. Can you pl help ASAP? i am planning to take the exam this week ... View more