Home
6.0 Development
This section contains information related to application development for ecosystem components and MapR products including MapR-DB (binary and JSON), MapR-FS, and MapR Streams.
Developer's Reference
This section contains in-depth information for the developer.
Hadoop Commands
This section describes the Hadoop commands.
hadoop version
The hadoop version command prints the hadoop software version.

6.0 Development
This section contains information related to application development for ecosystem components and MapR products including MapR-DB (binary and JSON), MapR-FS, and MapR Streams.
- Application Development Process
  Before you start developing applications on MapR’s Converged Data Platform, consider how you will get the data onto the platform, the format it will be stored in, the type of processing or modeling that is required, and how the data will be accessed.
- MapR-FS and Apps
  The following sections provide information about accessing MapR-FS with C and Java applications.
- MapR-DB and Apps
  This section contains information about developing client applications for JSON and binary tables.
- MapR-ES and Apps
  MapR-ES brings integrated publish and subscribe messaging to the MapR Converged Data Platform.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- MapR Data Science Refinery
  The MapR Data Science Refinery 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 FlexVolume Driver
  This section describes how to use and troubleshoot the MapR Data Fabric for Kubernetes FlexVolume Driver.
- Ecosystem Components
  The following sections provide information about each open source project that MapR supports.
- Maven and MapR
  This section discusses topics associated with Maven and MapR.
- Developer's Reference
  This section contains in-depth information for the developer.
  - MapR-DB Shell (JSON Tables)
    The mapr dbshell is a tool that enables you to create and perform basic manipulation of JSON tables and documents. You run dbshell by typing mapr dbshell on the command line after logging into a node in a MapR cluster.
  - Utilities for MapR-DB JSON Tables
    MapR-DB JSON provides utilities to copy, export, and import data, compare table content, and verify the consistency of secondary indexes.
  - MapR-DB HBase Shell (Binary Tables)
    You can manage MapR-DB tables using HBase shell commands and additional HBase shell commands included in the MapR distribution of Hadoop.
  - Utilities for MapR-DB Binary Tables
    MapR-DB provides utilities to copy and compare data in MapR-DB binary tables.
  - MapR-ES Utilities
  - YARN Commands
    This section describes the YARN commands.
  - Source Code for MapR Software
    MapR releases source code to the open-source community for enhancements that MapR has made to the Apache Hadoop project and other ecosystem components.
  - Hadoop Commands
    This section describes the Hadoop commands.
    - Overview
    - hadoop archive
      The hadoop archive command creates a Hadoop archive, a file that contains other files. A Hadoop archive always has a *.har extension.
    - hadoop classpath
      The hadoop classpath command prints the class path needed to access the Hadoop jar and the required libraries.
    - hadoop daemonlog
      The hadoop daemonlog command gets and sets the log level for each daemon.
    - hadoop distcp
      The hadoop distcp command is a tool used for large inter- and intra-cluster copying.
    - hadoop fs
      The hadoop fs command runs a generic file system user client that interacts with the MapR file system.
    - hadoop jar
      The hadoop jar command runs a program contained in a JAR file. Users can bundle their MapReduce code in a JAR file and execute it using this command.
    - hadoop job
      The hadoop job command enables you to manage MapReduce jobs.
    - hadoop mfs
      The hadoop mfs command performs operations on files and directories in the cluster.
    - hadoop mradmin
      The hadoop mradmin command runs Map-Reduce administrative commands.
    - hadoop pipes
      The hadoop pipes command runs a pipes job.
    - hadoop queue
      The hadoop queue command displays job queue information.
    - hadoop version
      The hadoop version command prints the hadoop software version.
    - hadoop conf
      The hadoop conf command outputs the configuration information for this node to standard output.
- API Documentation
  MapR supports public APIs for MapR-FS, MapR-DB, and MapR-ES. These APIs are available for application development purposes.

hadoop version

The hadoop version command prints the hadoop software version.

Syntax

hadoop  version

Output

mapr@mapr-desktop:~$ hadoop version  
Hadoop 2.7.0-mapr-1710-SNAPSHOT
Subversion git@github.com:mapr/private-hadoop-common.git -r 3790f2312344dd18b7702be5ce04afa0910dcca8
Compiled by root on 2019-03-07T12:39Z
Compiled with protoc 2.5.0
From source with checksum 4bae1f1833bbe061e9ff476d21609876
This command was run using /opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/common/hadoop-common-2.7.0-mapr-1710-SNAPSHOT.jar

(Topic last modified: 2019-05-01)