Starting CDH Services Using the Command Line

You need to start and stop services in the right order to make sure everything starts or stops cleanly.

Note: The Oracle JDK is required for all Hadoop components.

START services in this order:

Order	Service	Comments	For instructions and more information
1	ZooKeeper	Cloudera recommends starting ZooKeeper before starting HDFS; this is a requirement in a high-availability (HA)deployment. In any case, always start ZooKeeper before HBase.	Installing the ZooKeeper Server Package and Starting ZooKeeper on a Single Server; Installing ZooKeeper in a Production Environment; Deploying HDFS High Availability;Configuring High Availability for the JobTracker (MRv1)
2	HDFS	Start HDFS before all other services except ZooKeeper. If you are using HA, see the CDH 5 High Availability Guide for instructions.	Deploying HDFS on a Cluster; HDFS High Availability
3	HttpFS		HttpFS Installation
4a	MRv1	Start MapReduce before Hive or Oozie. Do not start MRv1 if YARN is running.	Deploying MapReduce v1 (MRv1) on a Cluster;Configuring High Availability for the JobTracker (MRv1)
4b	YARN	Start YARN before Hive or Oozie. Do not start YARN if MRv1 is running.	Deploying MapReduce v2 (YARN) on a Cluster
5	HBase		Starting and Stopping HBase; Deploying HBase in a Distributed Cluster
6	Hive	Start the Hive metastore before starting HiveServer2 and the Hive console.	Installing Hive
7	Oozie		Starting the Oozie Server
8	Flume 1.x		Running Flume
9	Sqoop		Sqoop Installation andSqoop 2 Installation
10	Hue		Hue Installation

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