About Release 7.1
This site contains documentation for HPE Ezmeral Data Fabric release 7.1, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.1 Installation
This section contains information about installing and upgrading HPE Ezmeral Data Fabric software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a HPE Ezmeral Data Fabric cluster.
7.1 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.1 Development
This section contains information related to application development for Ezmeral ecosystem components and HPE Ezmeral Data Fabric products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other data-fabric version documentation.
- Products Covered in the HPE Ezmeral Data Fabric Documentation
  This section lists the products covered in the HPE Ezmeral Data Fabric documentation portal and provides links to the related product documentation.
- Installer
  You must download and run the Installer setup script before you can start the Installer web interface or issue Installer Stanza commands.
  - Getting Started with the Installer
    This section describes things you need to do to start using the Installer.
  - Installer Operations
    This section describes operations you can perform using the Installer.
  - Installer Troubleshooting
    This section describes how to identify and solve problems when you use the Installer.
    - Installer Known Issues
      This topic describes some Installer known issues that you should be aware of while troubleshooting.
    - Logs for the Installer
      This topic describes the logs generated by the Installer and Installer Stanzas.
    - Creating an Archive of Installer Logs
      This topic describes how you can create a .zip archive of the logs generated by the Installer and Installer Stanzas. The .zip archive is a handy way to share log information with HPE support personnel.
    - Using Service Verification
      The service verification feature provides an easy way to verify that services on all nodes in the cluster are running and functional.
    - Starting and Stopping the Installer
      Describes how and when you need to shut down and restart the Installer.
    - Using probe and import to Generate the Installer Database
      Describes how to enable a manually installed cluster to use the Installer or Installer Stanza commands.
    - Resetting the Installer Database
      The reset command uninstalls the metadata from the Installer database. reset is for advanced users.
    - Troubleshooting Repository URL Errors
      This page describes how to troubleshoot an issue in which an incorrect repository URL is stored in the Installer properties.json file.
    - Changing Timeout Values to Resolve Installer Errors
      Change timeout values to reduce errors when using the Installer.
  - Installer Release Notes
    This release of the Installer works with RedHat/CentOS, Ubuntu, and SLES.
  - Installer Help Links
    Lists topics that help you prepare for an upgrade performed through the Installer web interface.
  - Installer Containers
    This section describes how you can obtain the Installer as a Docker container.
  - Installer Stanzas
    This section describes how to prepare for and use Installer Stanzas to install, upgrade, or uninstall software.
- Interoperability Matrices
  This section provides tables that show the operating system (OS), JDK, ecosystem, and data-fabric client support for the HPE Ezmeral Data Fabric. Check these tables for information about software compatibility.
- Ecosystem Component Release Notes
  The following release notes contain information for the components included in the HPE Ezmeral Data Fabric.
- Ecosystem Pack (EEP) Reference
  This section contains links to information that is specific to a given EEP.
- Control System Release Notes
  This section contains release notes for the HPE Ezmeral Data Fabric Control System.
- Kubernetes Interfaces for Data Fabric Release Notes
  This section contains release notes for the Kubernetes Interfaces for Data Fabric.
- Thin Client Release Notes
  This section contains release notes for the lightweight client applications that use the Data Access Gateway to send requests to the HPE Ezmeral Data Fabric.
- Security Vulnerabilities
  This section describes how to find information about potential security vulnerabilities in HPE Ezmeral Data Fabric software.
- Previous Versions
  This page contains links to the documentation for releases that are currently supported or have recently reached end-of-life.
- HPE Ezmeral Data Fabric Edge
  This section contains information about HPE Ezmeral Data Fabric Edge, which is a small footprint edition of the HPE Ezmeral Data Fabric. HPE Ezmeral Data Fabric Edge is designed to capture, process, and analyze IoT data close to the source.
- Support Articles in the HPE Support Center
  Data Fabric support articles moved to the HPE Support Center in 2022, changing the way you find and access the support articles.
- Doc Site Available as a PDF
  Provides a link to the downloadable PDF file containing all the information for the current release.
- Product Licensing
  Provides information related to product licensing.
- Other Resources
  This page provides links to additional resources such as on-demand training, videos, blogs, and the HPE Ezmeral Data Fabric community.
- Contact HPE
  Provides a link to contact HPE Sales or Support.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Starting and Stopping the Installer

Describes how and when you need to shut down and restart the Installer.

It is seldom necessary to shut down and restart the Installer, but you might need to do so in the following scenarios:

You are troubleshooting an Installer issue, and stopping and restarting the Installer might resolve the issue.
You need to upgrade the OS for a node. See When Upgrading Core with the Installer Requires an OS Upgrade.
You want to run the Installer node in FIPS-compliant mode, and you cannot leave the Installer running because the Installer is not FIPS compliant.

Checking the Installer Status

When you are not sure if the Installer is running, use the following command to check the status:

systemctl status mapr-installer

Starting and Restarting the Installer

To start or restart the Installer (requires root authentication):

systemctl start mapr-installer

Stopping the Installer

Note that if you stop the Installer while an installation is in progress, any passwords that you provided to the Installer user interface are lost. The Installer retains password information in memory and not in the Installer database. If you then restart the Installer to continue the installation, the installation fails. In this scenario, you must restart the Installer and the Installer user interface and re-enter the password information to resume the installation.

To stop the Installer (requires root authentication):

systemctl stop mapr-installer