MapR 5.2 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

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5.2 Installation
This section contains information on installing and upgrading MapR. It also contains information on how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
Upgrading MapR or MEP Components
Depending on your current configuration, you may choose to upgrade the MapR version (MapR Core), ecosystem components, clients, or MapR Monitoring components.
Upgrading MapR Core
Describes the process of upgrading MapR Core.
Upgrading MapR Core With the MapR Installer
If the cluster that you want to upgrade was installed using the MapR Installer, use the MapR Installer to upgrade MapR core.

MapR 5.2 Documentation

5.2 Installation
This section contains information on installing and upgrading MapR. It also contains information on how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
- Installing MapR or MEP Components
  Describes how to install MapR software and MapR Expansion Pack (MEP) components with the MapR Installer or without the MapR Installer.
- Installing MapR-XD
  Describes how to install MapR-XD software with or without the MapR Installer.
- Installing MapR in the Cloud
  Provides an overview of MapR cloud installer capabilities.
- Upgrading MapR or MEP Components
  Depending on your current configuration, you may choose to upgrade the MapR version (MapR Core), ecosystem components, clients, or MapR Monitoring components.
  - Upgrading MapR Core
    Describes the process of upgrading MapR Core.
    - Upgrading and your License
      If your are upgrading from MapR version 5.0 or earlier, the Base License file must be manually updated on all nodes in your cluster.
    - MapR Core Upgrade Process
      When you upgrade MapR Core, you will also upgrade a number of cluster components.
    - Planning the MapR Core Upgrade
      This section describes how to develop a sucessful plan for your upgrade process.
    - Preparing to Upgrade MapR Core
      Complete these pre-upgrade steps for MapR Core.
    - Upgrading MapR Core With the MapR Installer
      If the cluster that you want to upgrade was installed using the MapR Installer, use the MapR Installer to upgrade MapR core.
    - Performing a Maintenance Update
      Perform a maintenance update when you want to upgrade to a new patch version of MapR Core or apply a patch.
    - Preparing the Cluster for a Maintenance Update
      This section identifies how to prepare for applying either a minor update or a patch.
    - Upgrading MapR Core Without the MapR Installer
      If you installed the cluster without using the MapR Installer, you can upgrade without using the MapR Installer.
    - Finishing the MapR Core Upgrade
      This section provides post-upgrade steps for MapR Core.
  - Upgrading MapR Expansion Packs
    Describes how to upgrade MapR Expansion Packs (MEP), either as part of a MapR Core upgrade or to take advantage of a new MEP for the current version of MapR Core.
- Migrating to MapR
  Provides instructions for migrating business-critical data and applications from an Apache Hadoop cluster to a MapR cluster.
- Applying a Patch
  You can apply a patch by using the MapR Installer, by using the command line (a manual process), or by using a MapR Installer Stanza.

Upgrading MapR Core With the MapR Installer

If the cluster that you want to upgrade was installed using the MapR Installer, use the MapR Installer to upgrade MapR core.

Prerequisites

Before you begin, verify that your cluster is prepared for an upgrade.

WARNING: Service failures, job failures, or the loss of customized configuration files can occur if you do not perform the steps to prepare the cluster for an upgrade.

About this task

Procedure

Update the MapR Installer. For more information, see Updating the MapR Installer.
This step ensures that the MapR Installer has access to the latest packages.
Halt jobs and applications. Stop accepting new jobs and applications, and stop YARN applications.
```
# yarn application -list
# yarn application -kill <ApplicationId>
```
You might also need specific commands to terminate custom applications. The MapR Installer waits for MRv1 jobs to complete before it begins the upgrade.
Launch the MapR Installer URL ( https://<hostname/IPaddress>:9443)
Select the Version Upgrade option to complete the upgrade through the MapR Installer. The installer allows you to specify the MapR version, the MapR Expansion Pack (MEP) version, and the components and services you want to install.

NOTE: You can perform a maintenance update by selecting the Maintenance Update option. A maintenance update allows you to upgrade MapR Core to a newer patch version (for example, upgrading from MapR 5.2 to 5.2.1). For more information, see Performing a Maintenance Update.
Once the upgrade through the MapR Installer is complete, perform the post-upgrade steps. See Finishing the MapR Core Upgrade.