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.

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.
  1. 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.
  2. 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.

  3. Launch the MapR Installer URL ( https://<hostname/IPaddress>:9443)
  4. 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.
  5. Once the upgrade through the MapR Installer is complete, perform the post-upgrade steps. See Finishing the MapR Core Upgrade.