Hi Kuldeep, I have a question. What is the minimum number of journal nodes that are required for a cluster which is in namenode HA mode? From what I understand what the role of journal node is, only one or two should also be enough (even though in your example you have 3 journal nodes and even when I created a manual namenode HA cluster of 3 nodes, each node had a journal node totally again to 3 journal nodes) or is it that each node must have a journal node for example if I have 10 node cluster where I want to have NN HA enabled, will I require 10 journal nodes to be installed (one on each node)? ... View more

Hi, Kuldeep Kulkarni. I am trying to create cluster using ambari blueprint. But after registering blueprint and triggering cluster creation request successfully when I see progress in Ambari UI it stays stuck in PENDING HOST ASSIGNMENT which means that it is not able to connect or find hosts. But I have checked all the fqdn and ambari agents are also up and running. My approach is to store/ copy ambari.repo and hdp.repo in all hosts before hand so I have skipped step 4. What could be the problem???...please help!!! ... View more