Starting HDP Services

Start all the Hadoop services in the following order:

• HDFS
• MapReduce
• ZooKeeper
• HBase
• Hive Metastore
• HiveServer2
• WebHCat
• Oozie
• Ganglia
• Nagios

Instructions

1. Start HDFS
   1. Execute these commands on the NameNode host machine:su -l hdfs -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start namenode" 
   2. Execute these commands on the Secondary NameNode host machine:su -l hdfs -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start secondarynamenode” 
   3. Execute these commands on all DataNodes:su -l hdfs -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start datanode"
2. Start MapReduce
   1. Execute these commands on the JobTracker host machine:su -l mapred -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start jobtracker; sleep 25"
   2. Execute these commands on the JobTracker host machine:su -l mapred -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start historyserver" 
   3. Execute these commands on all TaskTrackers:su -l mapred -c "/usr/lib/hadoop/bin/hadoop-daemon.sh --config /etc/hadoop/conf start tasktracker"
3. Start ZooKeeper. On the ZooKeeper host machine, execute the following command:

   su - zookeeper -c "export  ZOOCFGDIR=/etc/zookeeper/conf ; export ZOOCFG=zoo.cfg ; source /etc/zookeeper/conf/zookeeper-env.sh ; /usr/lib/zookeeper/bin/zkServer.sh start"

4. Start HBase
   1. Execute these commands on the HBase Master host machine:su -l hbase -c "/usr/lib/hbase/bin/hbase-daemon.sh --config /etc/hbase/conf start master"
   2. Execute these commands on all RegionServers:su -l hbase -c "/usr/lib/hbase/bin/hbase-daemon.sh --config /etc/hbase/conf start regionserver" 
5. Start Hive Metastore. On the Hive Metastore host machine, execute the following command:su -l hive -c "nohup hive --service metastore > $HIVE_LOG_DIR/hive.out 2> $HIVE_LOG_DIR/hive.log &"  
   where $HIVE_LOG_DIR is the directory where Hive server logs are stored (example: /var/log/hive).
6. Start HiveServer2. On the Hive Server2 host machine, execute the following command:sudo su hive -c "nohup /usr/lib/hive/bin/hiveserver2 -hiveconf hive.metastore.uris=\" \" > $HIVE_LOG_DIR /hiveServer2.out 2>$HIVE_LOG_DIR/hiveServer2.log &" 
   where $HIVE_LOG_DIR is the directory where Hive server logs are stored (example: /var/log/hive).
7. Start WebHCat. On the WebHCat host machine, execute the following command:su -l hcat -c "/usr/lib/hcatalog/sbin/webhcat_server.sh start"
8. Start Oozie. On the Oozie server host machine, execute the following command:sudo su -l oozie -c "cd $OOZIE_LOG_DIR/log; /usr/lib/oozie/bin/oozie-start.sh" 
   where $OOZIE_LOG_DIR is the directory where Oozie log files are stored (for example: /var/log/oozie).
9. Start Ganglia.
   1. Execute this command on the Ganglia server host machine:/etc/init.d/hdp-gmetad start
   2. Execute this command on all the nodes in your Hadoop cluster:/etc/init.d/hdp-gmond start
10. Start Nagios.

    service nagios start