About Release 7.9.0
This site contains documentation for HPE Ezmeral Data Fabric release 7.9.0, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.9.0 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.
7.9.0 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.9.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.9.0 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.
- Application Development Process
  Before you start developing applications on the HPE Ezmeral Data Fabric platform, consider how you will get the data into the platform, the storage format of the data, the type of processing or modeling that is required, and how the data will be accessed.
- File Store and Apps
  The following sections provide information about accessing the File Store with C and Java applications.
- HPE Ezmeral Data Fabric Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- Apache Kafka Wire Protocol Service
  HPE Ezmeral Data Fabric Streams supports Apache Kafka Wire Protocol Service. Apache Kafka Wire Protocol Service is a TCP/IP service that emulates a Kafka cluster backed by HPE Ezmeral Data Fabric Streams. The service makes it possible for Apache Kafka clients written in any programming language to access topics in HPE Ezmeral Data Fabric Streams.
- HPE Ezmeral Data Fabric Streams and Apps
  HPE Ezmeral Data Fabric Streams brings integrated publish and subscribe messaging to HPE Ezmeral Data Fabric.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- Kubernetes Interfaces for Data Fabric
  This section describes how to leverage the capabilities of the Kubernetes Interfaces for Data Fabric.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the HPE Ezmeral Data Fabric.
  - Ecosystem Packs
  - Apache Airflow
    This topic provides an overview of Apache Airflow on HPE Ezmeral Data Fabric.
  - AsyncHBase
  - Cascading
  - Apache Drill
  - Hadoop
  - HBase
  - HBase Client and HPE Ezmeral Data Fabric Database Binary Tables
  - HCatalog
  - Hive
    - Getting Started with Hive
    - Configuring Hive
    - Integrating Hive
      - Hive and HPE Ezmeral Data Fabric Database Integration
      - Hive and HBase Integration
      - Hive and HPL/SQL Integration
      - Hive and HCatalog Integration
      - Hive and WebHCat Integration
        Configuring the WebHCat Server
        Configure WebHCat Server to use SSL Encryption
        Requirements for Using Automatically Generated PEM Files
        To use automatically generated PEM files for the WebHCat REST API on a MapR-SASL cluster, you need to have a cluster with a host name that consists at least of three parts: administrator user name and password, and WebHCat REST API host.
        Managing the WebHCat Server
        Running Jobs on the WebHCat Server
      - Hive and Tez Integration
        You can use Tez, instead of MapReduce, for generic data processing tasks. Tez significantly increases the processing speed. Tez, working with Hive, provides lower latency for interactive queries and higher throughput for batch queries.
    - Managing Hive Services
    - Connecting to Hive
    - Enabling High Availability for Hive
      This section describes how to enable High Availability for HiveServer2 and HiveMetastore.
    - Hive Features in HPE Ezmeral Data Fabric
      Describes HPE Ezmeral Data Fabric-specific features in Hive.
    - Hive 3.1.3 API Changes
      This topic describes the public API changes that occurred between Hive 2.3.9 EEP 8.1.0 and Hive 3.1.3 EEP 9.0.0.
    - Hive 2.3 API Changes
      This topic describes the public API changes that occurred between Hive 2.1 EEP 5.0.0 and Hive 2.3 EEP 6.0.0.
    - Hive 2.1 API
    - Troubleshooting Hive and Tez
    - Hive Logging
      This section describes Hive logging for Hive 2.1 and later releases and includes information about log splitting.
  - HttpFS
  - Hue
  - Livy
    Apache Livy is primarily used to provide integration between Hue and Spark.
  - HPE Ezmeral Data Fabric Streams Clients and Tools
    Describes the supported HPE Ezmeral Data Fabric Streams tools and clients.
  - NiFi
    This topic provides an overview of Apache NiFi on HPE Ezmeral Data Fabric.
  - OTel
    This topic provides an overview of OpenTelemetry on HPE Ezmeral Data Fabric.
  - Ranger
  - Apache Spark
  - YARN
  - Zeppelin
- Maven and the HPE Ezmeral Data Fabric
  This section discusses topics associated with Maven and the HPE Ezmeral Data Fabric.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  HPE Ezmeral Data Fabric supports public APIs for file system, HPE Ezmeral Data Fabric Database, and HPE Ezmeral Data Fabric Streams. These APIs are available for application-development purposes.
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.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Managing the WebHCat Server

About this task

As of Hive 0.13-1504 and Hive 1.0-1504, WebHCat is managed by Warden. Therefore, you can start and stop WebHCat using maprcli and the Control System.

Starting the WebHCat Server

About this task

Applies to versions prior to Hive 0.13-1504 and Hive 1.0-1504:

# ./webhcat_server.sh start

Starting WebHCat Using the maprcli

Procedure

Make a list of nodes on which Hive Metastore is configured.

Issue the maprcli node services command:

maprcli node services -name hcat -action start -nodes <space delimited list of nodes>

Stopping WebHCat Using the maprcli

Procedure

Make a list of nodes on which Hive Metastore is configured.

Issue the maprcli node services command:

maprcli node services -name hcat -action stop -nodes <space delimited list of nodes>

Starting or Stopping WebHCat Using the Control System

Procedure

In the Navigation pane, expand the Cluster Views pane and click Dashboard.
In the Services pane, click WebHcat to open the Nodes screen displaying all the nodes on which Hive Metastore is configured.
On the Nodes screen, click the hostname of each node to display its Node Properties screen.
On each Node Properties screen, use the Stop/Start button in the WebHcat row under Manage Node Services to start WebHcat.

Checking the Error Logs

About this task

Go to the following folder:

/opt/mapr/hive/hive-<version>/logs/<user.name>/webhcat

NOTE

If you are running a Hive 0.13 version prior Hive 0.13-1504, go to the /tmp/<user.name>/webhcat folder to view the error logs.

Verifying the Server's Status

About this task

In a web browser, navigate to:

 http://hostname:50111/templeton/v1/status?user.name=root

A healthy server will return the string {"status":"ok","version":"v1"}. You can change the port number from the default value of 50111 by editing the webhcat-site.xml file.

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HPE Ezmeral Data Fabric – Customer-Managed 7.9.0 Documentation
Abstract	This site contains documentation for the customer-managed platform of the HPE Ezmeral Data Fabric version 7.9.0 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
Published	November 2024
Edition	7.9.0