HPE Ezmeral Data Fabric 6.1.x is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About MapR 6.1
This site contains the main documentation for Version 6.1 of the MapR Converged Data Platform, including installation, configuration, administration, and reference information.
6.1 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
6.1 MapR Data Platform
MapR Data Platform is the industry-leading data platform for AI and analytics that solves enterprise business needs.
6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and MapR Data Platform products, including the file system, Database (Key-Value and JSON), and Event Streams.
- Application Development Process
  Before you start developing applications on the MapR Data Platform 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.
- MapR XD and Apps
  The following sections provide information about accessing the MapR XD with C and Java applications.
- MapR Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- MapR Event Store For Apache Kafka and Apps
  MapR Event Store For Apache Kafka brings integrated publish and subscribe messaging to MapR Data Platform.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- MapR Data Science Refinery
  The MapR Data Science Refinery product is an easy-to-deploy and scalable data science toolkit with native access to all platform assets and superior out-of-the-box security.
- MapR Data Fabric for Kubernetes
  This section describes how to leverage the capabilities of the MapR Data Fabric for Kubernetes.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the MapR Data Platform.
  - Ezmeral Ecosystem Packs
  - AsyncHBase
  - Cascading
  - Apache Drill
  - Flume
  - HBase
  - HBase Client and MapR Database Binary Tables
  - HCatalog
  - Hive
  - HttpFS
  - Hue
    - Hue Feature Support
    - Configure Hue
    - Integrate Hue
    - Use Hue
      This section provides information about using Hue, but it does not duplicate the Hue documentation.
      - Logging in to Hue 4.X
        Once Hue is installed and the configuration files have been edited, direct your browser to the IP address where you installed Hue.
      - Using Hue Welcome Tour
        After your first login, you will be introduced to the new features in Hue 4 by the "Welcome Hue 4!" tour.
      - Getting Started with the Quick Start Wizard (Hue 4.X)
        With the Quick Start Wizard you can check configuration, install examples, and create users.
      - User Administration in Hue 4.X
        By default, the Hue interface is configured to use PAM for authentication; so you cannot use the Hue interface to create users or edit their passwords.
      - Managing MapR Database Binary Tables in Hue 4.X
        You can create and manage MapR Database binary tables in the HBase Browser of the Hue interface.
      - Starting the Hue Webserver
        After you configure the hue.ini, you need to start the Hue Webserver and verify that it has started.
    - Sqoop2
  - Impala
  - Livy
    Apache Livy is primarily used to provide integration between Hue and Spark.
  - MapR Event Store For Apache Kafka Clients and Tools
    Describes the supported MapR Event Store For Apache Kafka tools and clients.
  - S3 Gateway
    The S3 gateway is a service that provides an S3-compatible interface to expose data in MapR Data Platform as objects. The S3 gateway manages all inbound S3 API requests to put data into and get data out of cloud storage.
  - Myriad
  - Oozie
  - Pig
  - Sentry
  - Apache Spark
  - Sqoop
  - YARN
  - Zeppelin
- Maven and MapR
  This section discusses topics associated with Maven and MapR.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  MapR Data Platform supports public APIs for MapR File System, MapR Database, and MapR Event Store For Apache Kafka. These APIs are available for application-development purposes.
Other Docs
This section contains release-independent information, including: MapR Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other MapR version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Starting the Hue Webserver

After you configure the hue.ini, you need to start the Hue Webserver and verify that it has started.

Procedure

To start/restart the Hue Webserver, run the following command:
- If Hue is installed on a cluster node (the common use case and recommended practice), run the following command to start the Hue webserver:
```
maprcli node services -name hue -action start -nodes <ip_address>
```
- If Hue is installed on a cluster node (the common use case and recommended practice), run the following command to restart the Hue webserver:
```
maprcli node services -name hue -action restart -nodes <ip_address>
```
- If Hue is installed on an edge node (not recommended), run the following command to start the Hue webserver:
```
/opt/mapr/hue/hue-<version>/bin/hue-server start
```
To verify that the Hue webserver started, enter: lsof -i:8888
The output from this command should look similar to this:
```
COMMAND     PID USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
python2.6 27688 mapr    3u  IPv4 69955314      0t0  TCP *:ddi-tcp-1 (LISTEN)
python2.6 27691 mapr    3u  IPv4 69955314      0t0  TCP *:ddi-tcp-1 (LISTEN)
```
You can also check Hue webserver logs to verify that Hue webserver started. If the Hue webserver was installed on a cluster node or an edge node, the log is found here:
```
/opt/mapr/hue/hue-<version>/logs/runcpserver.log 
```