@Jena  Great patience never give up 😁😂. I think your problem is now resolved I suspect incompatibility problem with IE 11 I need to check the documentation later today. Please take some time to accept my reponse as valid answer  so other members can use 8t to resolve the same issue. Happy hadooping ... View more

@ThanhP  There you go a happy member 😁😂 Please get some time and accept my solution so other members can use it to solution the same problem. Happy hadooping !!! ... View more

@ThanhP    The log says the opposite "Started ServerConnector@7692d9cc{HTTP/1.1,[http/1.1]}{0.0.0.0:9995}" I think you should be hitting the wrong port or IP.  How have you set up your network?  Bridged/NAT, can you share the output of  $ ifconfig If you are launching Zeppelin through Ambari Login to Ambari (operations console) as user  amy_ds/amy_ds  username/password combination.  http://sandbox-hdp.hortonworks.com:9995 Please share your feedback ... View more

@irfangk1    That means you didn't install MySQL. Can I ask you one question? What documentation are you using as a reference?The basic steps are described when you are preparing the environment. To me it seems you launched the deployment using the embedded database Postgresql but now you want to switch to MySQL. To do that you need to install mysql and pre-create the ambari database before launching the Ambari server setup, that explains why you are getting all those errors. I can send you a procedure in 9 hours ... View more

@irfangk1  Can you share the screenshot of your Ambari Hive config  because when I see "jdbc:mysql://host.com/metastore" "hive"   that means you dont have  not The default  TCP port  for PostgreSQL is usually 5432 see in the postgresql.conf ... View more

@irfangk1  If you switched to Mysql why do you have these entries in your ambari.properties   server.jdbc.database=postgres server.jdbc.database_name=ambari server.jdbc.postgres.schema=ambari   Can you share the output of  # cat /etc/ambari-server/conf/ambari.properties | grep mysql Why is that in the log again I see  "jdbc:mysql://host.com/metastore" "hive"  where is the PORT  number?   ... View more

@irfangk1    This line in your error log says it all org.apache.ambari.server.DBConnectionVerification "jdbc:mysql://host.com/metastore" "hive" The format should be jdbc:mysql://host-name: port usually for Mysql it's 3306 to initiate any database connectivity you need to know the port at which the database is waiting for connections   Ambari.properties # cat /etc/ambari-server/conf/ambari.properties | grep mysql custom.mysql.jdbc.name=mysql-connector-java.jar previous.custom.mysql.jdbc.name=mysql-connector-java.jar server.jdbc.database=mysql server.jdbc.driver=com.mysql.jdbc.Driver server.jdbc.rca.driver=com.mysql.jdbc.Driver server.jdbc.rca.url=jdbc:mysql://your_host:3306/ambari server.jdbc.url=jdbc:mysql://your_host:3306/ambari Backup these files  Verification jar # mv /var/lib/ambari-agent/cache/DBConnectionVerification.jar /var/lib/ambari-agent/cache/DBConnectionVerification.jar.bck MySql connector  # mv /var/lib/ambari-agent/cache/mysql-connector-java.jar  /var/lib/ambari-agent/cache/mysql-connector-java.jar.bck Then restart Ambari and the agent    ... View more