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 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.
Upgrading the MEP With the MapR Installer
If the cluster that you want to upgrade was installed using the MapR Installer, you can use the MapR Installer to upgrade the MapR Expansion Pack (MEP).

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 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.
    - Planning MapR Expansion Pack (MEP) Upgrades
      The set of Ecosystem components that you run in the cluster must all belong to the same MEP.
    - Preparing to Upgrade the MEP
      Complete these pre-upgrade steps for each component in the MapR Expansion Pack (MEP) that you want to upgrade.
    - Upgrading the MEP With the MapR Installer
      If the cluster that you want to upgrade was installed using the MapR Installer, you can use the MapR Installer to upgrade the MapR Expansion Pack (MEP).
    - Upgrading the MEP Without the MapR Installer
      After you upgrade MapR core without using the MapR Installer, you need to upgrade ecosystems components with manual steps. First, verify that your repository is configured to use a MapR Expansion Pack (MEP) that is supported by your cluster version. Then, upgrade each component manually.
    - Finishing the MEP Upgrade
      Complete the post-upgrade steps for each ecosystem component that was upgraded.
- 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 the MEP With the MapR Installer

If the cluster that you want to upgrade was installed using the MapR Installer, you can use the MapR Installer to upgrade the MapR Expansion Pack (MEP).

Prerequisites

Before you begin, verify that all ecosystem components are 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 ecosystem components 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 Incremental Install option.
Select the MEP Version to which you want to upgrade, and complete the upgrade through the MapR Installer.
Once the upgrade through the MapR Installer is complete, perform the post-upgrade steps. See Finishing the MEP Upgrade.