@Robin Dong Any updates? ... View more

[root@hostx .ssh]# ls authorized_keys id_rsa id_rsa.pub known_hosts The first one contains the private key, the second one contains the public key for user root. Now run the command cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys it will add the contents of the root’s file id_rsa.pub to a file authorized_keys. Therefore, if a user will connect to this machine by SSH and will specify the correct private key, this machine will look up into authorized_keys and will know that this is root. remember to copy the authorized_keys to all the servers in the cluster Also check the permissions on the .ssh directory, id.rsa,authorized_keys and id_rsa.pub keys ... View more

@rbalam so do you have the mysql-connector-java on the Ambari server ? If not copy it please. ... View more

@rbalam your Ambari installation looks good exit code 0 ,but am puzzled . can you copy and paste in here your mysql setup for ambari steps? ... View more

@rbalam Try this steps to clean up your failed installation, just to make sure did you in th eeralier steps copy mysql-connector-java.jar to /usr/share/java/ directory to both servers ? ... View more

@rbalam I have attached a document on how to install your Ambari server successfully you will not find any better document than this .Please enjoy and revert set-up-mysql-for-ambari.pdf I forgot to include the syntax to connect remotely to MySQL server but it should be fine The Ambari Server host needs the mysql-connector-java driver installed to be able to communicate with the database you will need to install it on the local and remote server ... View more

@Rainer Geissendoerfer To fix this, SSH into your HDP instance VM and edit: /etc/hadoop/conf/core-site.xml and change the following config to add “localhost”. Save and restart the relevant services or just reboot your HDP VM instances. <property> <name>hadoop.proxyuser.hive.hosts</name> <value>sandbox.hortonworks.com,127.0.0.1,localhost</value> </property> core-site.xml ... View more

@Majid Ali Syed Amjad Ali Sayed A 2 node cluster shouldn't pose alot of problems, YES the agent and Ambari server can runon te same host Make sure you did all the belows steps successfully as the root user 1. Validate that your network setup is correct IP,Hostname FQDN etc 2. Run ssh-keygen and copy the id_rsa generated key to all the hosts and configuring passwordless SSH connect between the 2 servers for root user 2. Disable firewall / iptables on all the cluster hosts 3. Disable SELinux 4. Disable Transparent Huge Pages (THP) 5. Configure Database for ambari assuming you are using MySQL and dont forget to yum install mysql-connector-java and the appropriate permissions 644 and pre-load the Ambari database schema into your MySQL database 6. yum install ambari-server 7. ambari-server setup output Ambari Server 'setup' completed successfully. 8. Start the server #ambari-server start 1. Run ssh-keygen and copy the id_rsa generated key to all the hosts 2. Disable firewall / iptables on all the cluster hosts 3. Disable SELinux 4. Disable Transparent Huge Pages (THP) 6. Configure Database for ambari assuming you are using MySQL and dont forget to yum install mysql-connector-java and the appropriate permissions 644 and pre-load the Ambari database schema into your MySQL database I recently did a 4 node cluster install without tweaking the proxy in ambari-env.sh Could you paste the screen shot and logs in here ... View more

@Vinayak Agrawal Are you running the sqoop job as user yarn? if not the user running the sqoop job should have the appropriate permissions eg 777 /tmp/hive/yarn/_tez_session_dir/xxxxx ... View more