Thanks for all your response, i have resolved this issue, it is related with my local DNS server settings which makes my hostname different with what i am setting for each agent, so the agent could not find the correct hostname and the ip for others. after i removed my local DNS server and place back the /etc/hosts files to point all the hosts it comes back. Thanks All. ... View more

@Yibing Liu: can you please share what evidence lead to infer that the problem is with notebook size. ... View more

Hi @Matt Foley: Thanks very much for your response. actually i have followed this article and both 3 points were yes for me. since i am not a fresh installation, after i checked my cluster again i found that the version is different between my master and the new host, not sure why it happened, i just upgraded my Ambari-server and ambari-agent, and re-deployed to the new host server, it works. Thanks very much. ... View more

Thanks very much, what i am finding is the place to set my repository URL in Ambari->Admin->Vesions, i have already removed unneccessary repo files yet, let me update the set of repo in Ambari and have another try. ... View more