10. Customize Services

Customize Services presents you with a set of tabs that let you manage configuration settings for HDP components. The wizard sets reasonable defaults for each of the options here, but you can use this set of tabs to tweak those settings. You are strongly encouraged to do so, as your requirements may be slightly different. Pay particular attention to the directories suggested by the installer.

	Important
	To prevent out-of-memory errors during the install, at the Customize Services step in the Cluster Install wizard browse to Hive > hive-site.xml, then modify the following configuration settings:

	Note
	For the HDFSServicesConfigsGeneral configuration property, make sure to enter an integer value, in bytes, that sets the HDFS maximum edit log size for checkpointing. A typical value is 500000000.

Hover your cursor over each of the properties to see a brief description of what it does. The number of tabs you see is based on the type of installation you have decided to do. A typical installation has at least ten groups of configuration properties and other related options, such as database settings for Hive/HCat and Oozie, admin name/password, and alert email for Nagios.

The install wizard sets reasonable defaults for all properties. You must provide database passwords for the Hive, Nagios, and Oozie services, the Master Secret for Knox, and a valid email address to which system alerts will be sent. Select each service that displays a number highlighted red. Then, fill in the required field on the Service Config tab. Repeat this until the red flags disappear.

For example, Choose Hive. Expand the Hive Metastore section, if necessary. In Database Password, provide a password, then retype to confirm it, in the fields marked red and "This is required."

For more information about customizing specific services for a particular HDP Stack, see Customizing HDP Services.

After you complete Customizing Services, choose Next.