I encounter exact the same js error and in step 3, my cluster shows Current: 14/16. However, there is no error on hosts under Ambari--> Hosts(All hosts are marked with green tick) Cloud you give more information on how to find our the failed components? ====> Update 1: I think the reason my cluster shows Current: 14/16 may be that I also install Solr(2 nodes) via Ambari http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.5.0/bk_solr-search-installation/content/ch_hdp-search-install-ambari.html the [Current Version:] section of the 2 Solr nodes (e.g. Hosts--->solr01.company.com) are empty. ====> Update 2: Based on the thoughts in Update 1, I delete the installed Solr service, then the error disappears. Now the "Add Service" function works well. But it seems that I need to find another way to deploy Solr(a standalone Solr cluster or install Solr via Ambari after all the other services are installed.) ... View more