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
  - 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.
    - KSQL
      KSQL is an open-source streaming SQL engine that implements continuous, interactive queries.
    - Kafka Streams
      Kafka Streams is a programming library used for creating Java or Scala streaming applications and, specifically, building streaming applications that transform input topics into output topics.
    - Kafka REST Proxy
      The Kafka REST Proxy provides a RESTful interface to MapR Event Store For Apache Kafka clusters to consume and produce messages and to perform administrative operations.
      - Configuration
        This section describes how to configure the Kafka REST Proxy for MapR Event Store For Apache Kafka.
        Configuration Parameters
        This section provides the Kafka REST Proxy for MapR Event Store For Apache Kafka parameters.
        Security Parameters
        Describes Kafka REST security parameters.
        SSL Security Configuration
        Describes how to configure Kafka REST security.
        User Impersonation
        Describes how to disable, enable, and use impersonation with Kafka REST.
        Saving Kafka REST Configurations
        Describes how Kafka REST configurations are saved during an upgrade.
      - Services Management
        The Kafka REST Proxy for MapR Event Store For Apache Kafka service can be started, restarted, and stopped via the maprcli nodes services command or using the REST API equivalent.
      - HTTP Methods and URI Summary
        This section provides HTTP method and URI summaries for multiple Kafka REST Proxy API versions for MapR Event Store For Apache Kafka.
    - Kafka Connect
      Kafka Connect is a utility for streaming data between MapR Event Store For Apache Kafka and other storage systems.
    - Kafka Schema Registry
      Kafka Schema Registry provides a RESTful interface for storing and retrieving schemas.
    - Structured Streaming in Spark
      Starting in EEP 5.0.0, structured streaming is supported in Spark.
  - 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.

Saving Kafka REST Configurations

Describes how Kafka REST configurations are saved during an upgrade.

Starting in EEP 6.0.0, the configuration for a previously installed version of Kafka REST is stored in a folder with a timestamp.

The configuration files are saved and overwritten by new configuration files when upgrading from:
- 4.1.0 to 5.1.2
- 5.1.2 to 6.0.0.0
The configuration files are saved only (not overwritten) when upgrading from:
- 5.1.2 to 5.1.2

Example

The following example shows the list of configuration files that are saved after upgrading from EEP 6.3.1 to EEP 6.3.2:

ls /opt/mapr/kafka-rest/
kafka-rest-4.1.0  kafka-rest-4.1.0.202009150334  kafka-restversion

ls /opt/mapr/kafka-rest/kafka-rest-4.1.0.202009150334/config/
kafka-rest.properties  log4j.properties  warden.kafka-rest.conf