@Saurabh Kumar I don't have an HA cluster to test with but testing on Sandbox worked for me with hadoop command, not hdfs. Please double-check your properties. The safest route is to determine the active namenode at the time of copy, I agree it's not the most optimal solution. Tagging experts @stevel @Chris Nauroth cp /etc/hadoop/conf/hdfs-site.xml distcp.xml mkdir confdir && mv distcp.xml confdir hadoop --config confdir distcp hdfs://sandbox.hortonworks.com:8020/user/root/sample.json hdfs://sandbox.hortonworks.com:8020/user/root/sample.json5 ... View more

@Heath Abelson before you login to Ambari UI, try hard reset of the browser cache by hitting CTRL-SHIFT-R. After that try to login again. ... View more

@Heath Abelson please take a look at this solution, does it help you at all? https://community.hortonworks.com/questions/20603/500-status-code-received-on-get-method-for-api-api.html#answer-20610 ... View more

@Swapnil Prabhu what does the ambari server log say? I'd give it a bit of time and try again. ... View more

@Ram D I believe you stop the service first and then decommission. That's the way it's done in Ambari. Please refer to this https://docs.hortonworks.com/HDPDocuments/Ambari-2.1.2.1/bk_Ambari_Users_Guide/content/_deleting_a_host_from_a_cluster.html ... View more

@jbarnett I notified the documentation team to fix this. Thanks for catching it. Just to confirm, you replaced colon as stated in the doc with , as in the apache docs and your problem was solved? ... View more

@Ram D https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=41812517 ... View more