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, review Planning Your MapR Core Upgrade, and verify that your cluster is prepared for an upgrade. In some cases, a maintenance update can be performed rather than a version upgrade. For more information, see Performing a Maintenance Update
Warning: The Version Upgrade operation is an offline operation. 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.
Note: To upgrade to MapR 6.0 or later using the MapR Installer, MapR 5.2.x and MEP 3.0.1 or later must be installed on your cluster. If security is enabled on the cluster, you cannot use the MapR Installer or Stanzas to upgrade. You must perform the upgrade manually.
  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.

  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 Ecosystem Pack (MEP) version, and the components and services you want to install.
    • Do not refresh the browser page during the upgrade sequence. Doing so can cause errors. For more information, see IN-1915 in MapR Installer Known Issues.
    • If you upgrade a non-secure cluster to MapR 6.0.1 or later and metrics monitoring is enabled, the MapR Installer asks you to specify a password for the Grafana administrator ID (admin). You must specify a password. For more information about Grafana password requirements, see Logging on to Grafana.
    • If the MapR Installer indicates that the version upgrade failed, or if the following error message is displayed, use the Import State command to revert the cluster to the last known state. See Importing or Exporting the Cluster State.
      Custom secure cluster < MapR core 6.0.0 cannot be upgraded
  5. Once the upgrade through the MapR Installer is complete, perform the post-upgrade steps. See Finishing the MapR Core Upgrade.