This is the documentation for CDH 5.1.x. Documentation for other versions is available at Cloudera Documentation.

Upgrading from an Earlier CDH 5 Release to the Latest Release

  Important:

If you are using Cloudera Manager to manage CDH, do not use the instructions in this section. Follow the directions in Managing Clusters with Cloudera Manager to upgrade to the latest version of CDH 5 in a Cloudera-managed deployment.

  Important:
  • Use the right instructions: the instructions in this section describe how to upgrade to the latest CDH 5 release from an earlier CDH 5 release. If you are upgrading from a CDH 4 release, use the instructions under Upgrading from CDH 4 to CDH 5 instead.
  • MapReduce v1 (MRv1) and MapReduce v2 (YARN): this page covers upgrade for MapReduce v1 (MRv1) and MapReduce v2 (YARN). MRv1 and YARN share common configuration files, so it is safe to configure both of them so long as you run only one set of daemons at any one time. Cloudera does not support running MRv1 and YARN daemons on the same nodes at the same time; it will degrade performance and may result in an unstable cluster deployment. Before deciding to deploy YARN, make sure you read the discussion on the CDH 5 Installation page under MapReduce 2.0 (YARN).
  Note: Running Services

When starting, stopping and restarting CDH components, always use the service (8) command rather than running scripts in /etc/init.d directly. This is important because service sets the current working directory to / and removes most environment variables (passing only LANG and TERM) so as to create a predictable environment in which to administer the service. If you run the scripts in /etc/init.d, any environment variables you have set remain in force, and could produce unpredictable results. (If you install CDH from packages, service will be installed as part of the Linux Standard Base (LSB).)

The following sections provide the information and instructions you need:

Page generated September 3, 2015.