{"id":24003,"date":"2018-08-28T09:20:43","date_gmt":"2018-08-28T09:20:43","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=24003"},"modified":"2018-08-28T09:20:43","modified_gmt":"2018-08-28T09:20:43","slug":"troubleshooting-ambari","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/troubleshooting-ambari\/","title":{"rendered":"Troubleshooting Ambari – Resolving General Problems"},"content":{"rendered":"

Today, in this Ambari article<\/strong>, “Troubleshooting Ambari” we will learn that how to resolve general problems of Apache Ambari in detail. <\/span><\/p>\n

So, let’s begin Troubleshooting Ambari.\u00a0<\/span><\/p>\n

Troubleshooting Ambari<\/span><\/h2>\n

In order to help to troubleshoot any issues we might have on installing Ambari<\/strong> with an existing Oracle database, we can use following entries:<\/span><\/p>\n

a. Problem 1<\/span><\/h3>\n

Ambari Server Fails to Start: No Driver<\/span>
\nCheck \/var\/log\/ambari-server\/ambari-server.log for :<\/b>
\nExceptionDescription:Configurationerror.<\/b>
\nClass[oracle.jdbc.driver.OracleDriver] not found.<\/b>
\nNot able to found the Oracle JDBC .jar file.<\/span><\/p>\n

    \n
  • Solution<\/strong><\/li>\n<\/ul>\n

    Re-run ambari-server setup if you are sure about the file that it is in the appropriate directory on the Ambari server. <\/span><\/p>\n

    b. Problem 2<\/span><\/h3>\n

    Ambari Server Fails to Start: No Connection<\/span>
    \nCheck \/var\/log\/ambari-server\/ambari-server.log for :<\/b>
    \nThe Network Adapter could not establish the connection<\/b>
    \nError Code: 17002<\/b>
    \nAmbari Server and the database are not connected.<\/span><\/p>\n

      \n
    • Solution<\/strong><\/li>\n<\/ul>\n

      Makes sure that the database correctly configured by reading \/etc\/ambari-server\/conf\/ambari.properties and also endure that the host is reachable from the Ambari Server.<\/span><\/p>\n

      server.jdbc.url=jdbc:oracle:thin:\n         @oracle.database.hostname:1521\/ambaridb\nserver.jdbc.rca.url=jdbc:oracle:thin:\n         @oracle.database.hostname:1521\/ambaridb<\/pre>\n
      c. Problem 3<\/span><\/h3>\n
      Ambari Server Fails to Start: Bad Username<\/span>
      \nCheck \/var\/log\/ambari-server\/ambari-server.log for :<\/b>
      \nInternal Exception: java.sql.SQLException: ORA\u00ad01017:<\/b>
      \ninvalid username\/password; logon denied<\/b>
      \nAn invalid username\/password is used.<\/span><\/p>\n
        \n
      •  Solution<\/strong><\/li>\n<\/ul>\n
        Make sure that the user account has the correct privileges and also it is set up in the database.<\/span><\/p>\n
        d. Problem 4<\/span><\/h3>\n
        Ambari Server Fails to Start: No Schema<\/span>
        \nCheck \/var\/log\/ambari-server\/ambari-server.log for :<\/b>
        \n Internal Exception: java.sql.SQLSyntaxErrorException: ORA\u00ad00942:<\/b>
        \ntable or view does not exist<\/b>
        \nBasically, the schema has not been loaded.<\/span><\/p>\n
          \n
        • Solution<\/strong><\/li>\n<\/ul>\n
          Ensure that if you have loaded the database schema.<\/span><\/p>\n
          e. Problem 5<\/h3>\n
          Ambari shows both NameNodes as the standby just after changing NameNode RPC port.
          \nChange the NameNode RPC ports (by customizing the dfs.namenode.servicerpc-address property), if we have enabled NameNode HA, and it will display both NameNodes as standby.<\/p>\n
            \n
          • Solution<\/strong><\/li>\n<\/ul>\n
            We need to format ZKFC to make sure that the config data in ZooKeeper is refreshed\u00a0while modifying the NameNode RPC port (dfs.namenode.servicerpc-address) after enabling NameNode HA. Further to format ZKFC znode, run the following command:<\/p>\n
            su - <hdfs-user> -c 'hdfs zkfc -formatZK'<\/pre>\n
            So, this was all about Troubleshooting Ambari. Hope you like our explanation.<\/p>\n
            Conclusion: Apache Ambari Troubleshooting<\/h2>\n
            Hence, we have seen the solution to all the general problems of Apache Ambari, in Ambari Troubleshooting article. Still, if you have any query regarding Ambari Troubleshooting ask in the comment tab.<\/p>\n","protected":false},"excerpt":{"rendered":"
            Today, in this Ambari article, “Troubleshooting Ambari” we will learn that how to resolve general problems of Apache Ambari in detail. So, let’s begin Troubleshooting Ambari.\u00a0 Troubleshooting Ambari In order to help to troubleshoot...<\/p>\n","protected":false},"author":6,"featured_media":26400,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[639,647,731,733,8129,9990,14959,14960],"class_list":["post-24003","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ambari","tag-ambari-known-issues","tag-ambari-tutorial","tag-apache-ambari-issues","tag-apache-ambari-tutorial","tag-learn-ambari","tag-problems-with-ambari","tag-troubleshooting-ambari","tag-troubleshooting-in-ambari"],"yoast_head":"\nTroubleshooting Ambari - Resolving General Problems - DataFlair<\/title>\n<meta name=\"description\" content=\"Apache Ambati Troubleshooting, Resolving problems in Ambari, Troubleshooting Ambari Deployments, Problem & Solution in Ambari,Ambari known issues\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/troubleshooting-ambari\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Troubleshooting Ambari - 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