@white wartih Can you pelase share the complete stackTrace of the failure from the ambari-server.log? ... View more

@nshelke Perfect solution, thanks. ... View more

@arjun more A workaround that i think at this point may be: 1) Stop All region servers 2) Login to Master then perform the removal of "/hbase-unsecure" (i assume your cluster is non kerberized) hbase zkcli rmr /hbase-unsecure 3). Restart HBase . NOTE: You should always think twice before running "rmr /hbase-unsecure" ... View more

@John Cleveland Good to know that your issue is resolved. Few details: hadoop.proxyuser.<USER>.hosts From File View perspective: Here we need to replace the <USER> with the username who is actually running the Ambari Server (Or Standalone Ambari FileView Server) . So if you are running ambari server as "root" user then you will need to set the property for "root" user as "hadoop.proxyuser.root.groups". The Value of this property can be a comma separated list of addresses where you are running the ambari server (OR Standalone View Ambari Server for hosting the View) . Because View Server will actually send requests to Hadoop. So hadoop need to allow access from the host where the FileView is running. Setting * means you can use the FileView (Standalone Ambari View Server) which is installed to any host. (In a kerberized environment we need to replace the <USER> with the ambari server kerberos principal name). From Generic Hadoop Perspective: In general, By Using proxy user using properties "hadoop.proxyuser.$superuser.hosts" along with either or both of "hadoop.proxyuser.$superuser.groups" and "hadoop.proxyuser.$superuser.users". By specifying as below in core-site.xml, the superuser named super can connect only from host1 and host2 to impersonate a user belonging to group1 and group2. Following document explains it with examples: https://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-common/Superusers.html ... View more

@Robin Dong Sometimes this can happen in a scenario where as soon as the instances are shutdown and restarted back, the IP addresses and hostnames change, which means the cluster doesn’t know where to find its various services. . ... View more

@Robin Dong Which version of ambari are you using ? If you are using Ambari version 2.4.x, and want to use SmartSense 1.4.x, you must first download and install it (Downloading and Installing SmartSense Binary). Please see: https://docs.hortonworks.com/HDPDocuments/SS1/SmartSense-1.4.0/bk_installation/content/ambari_install.html From Ambari 2.5 this behaviour is changed : https://docs.hortonworks.com/HDPDocuments/Ambari-2.5.0.3/bk_ambari-release-notes/content/ambari_relnotes-2.5.0.3-behavioral-changes.html . ... View more

@Ramon Wartala What principals do you see when you run the following command using "kadmin.local" on the KDC ? # kadmin.local -q "listprincs" | grep zookeeper . ... View more