MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

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5.1 Reference
This section provides information about development content including MapR-FS and MapReduce development topics and reference content.
Reference Guide
maprcli and REST API Syntax
node
Manages nodes in the cluster
node listzookeepers
Returns the hostnames of the nodes in the cluster that are running the zookeeper service.

MapR 5.1 Documentation

5.1 Reference
This section provides information about development content including MapR-FS and MapReduce development topics and reference content.
- Development Guide
- Reference Guide
  - MapR Control System
  - Hadoop Commands
  - HBase Shell for MapR-DB
    You can manage MapR-DB tables using HBase shell commands and additional HBase shell commands included in the MapR distribution of Hadoop.
  - YARN commands
  - maprcli and REST API Syntax
    - Overview
      Each command reference page includes the command syntax, a table that describes the parameters, and examples of command usage.
    - acl
      Describes the acl commands used to access control lists (ACLs).
    - alarm
      Describes the alarm commands that perform functions related to system alarms.
    - audit
      Describes commands used to audit operations related to cluster management and data access.
    - blacklist
      Describes commands used to blacklist and to list blacklisted users.
    - cluster
      Manages cluster features, gateways, and cluster-wide settings.
    - config
      Manages configuration values for the MapR cluster.
    - dashboard info
      Displays a summary of information about the cluster.
    - dialhome
    - disk
      Describes command for working with disks.
    - dump
      Returns key information about volumes, containers, storage pools, and MapR cluster services for debugging and troubleshooting.
    - entity
      Manages entities (users and groups).
    - fid
      Displays information about MapR-DB or file-system components that are identified by a FID.
    - job
      Manages Hadoop jobs running on the cluster.
    - license
      Manages MapR licenses.
    - nagios generate
      Generates a Nagios Object Definition file that describes the cluster nodes and the services running on each.
    - nfsmgmt
      Refreshes NFS exports and server cache.
    - node
      Manages nodes in the cluster
      - node allow-into-cluster
        Allows host IDs to join the cluster after duplicates have been resolved.
      - node cldbmaster
        Returns the address of the master CLDB node.
      - node failover
        Fails over master containers and VIPs to another node.
      - node heatmap
        Displays a heatmap for the specified nodes.
      - node list
        Lists nodes in the cluster.
      - node listcldbs
        Returns the hostnames of the nodes in the cluster that are running the CLDB service.
      - node listcldbzks
        Returns the hostnames of the nodes in the cluster that are running the CLDB service and the IP addresses and port numbers for the nodes in the cluster that are running the ZooKeeper service.
      - node listzookeepers
        Returns the hostnames of the nodes in the cluster that are running the zookeeper service.
      - node maintenance
        Places a node into a maintenance mode for a specified timeout duration.
      - node metrics
        Retrieves metrics information for nodes in a cluster.
      - node move
        Moves one or more nodes to a different topology. Permissions required: fc or a.
      - node remove
        Removes one or more server nodes from the system. Permissions required: fc or a.
      - node services
        Starts, stops, or restarts services on one or more server nodes. Permissions required: ss, fc or a.
      - node topo
        Lists cluster topology information.
    - rlimit
      Manages resource usage limits for the cluster.
    - schedule
      Manages schedules.
    - service list
      Lists all services on the specified node, the memory allocated for each service, the state of each service, and log path for each service.
    - setloglevel
      Sets log level on individual services.
    - stream
      Manages stream functionality.
    - table
      Performs functions related to MapR-DB tables.
    - task
      Manipulates information about the Hadoop jobs that are running on your cluster.
    - trace
      Lets you view and modify the trace buffer, and the trace levels for the system modules.
    - urls
      Displays the status page URL for the specified service.
    - virtualip
      Manages virtual IP addresses for NFS nodes.
    - volume
      Manages volumes, snapshots and mirrors.
  - Alarms Reference
  - Utilities
  - Default MapR Configurations
  - Configuration Files
  - MapR Environment
  - MapR Parameters
  - Best Practices
  - Language Support for MapR-DB Tables
  - Glossary
    This section contains defintions for commonly used terms in MapR Converged Data Platform environments.
  - Source Code for MapR Software
- Glossary
  This section contains defintions for commonly used terms in MapR Converged Data Platform environments.

node listzookeepers

Returns the hostnames of the nodes in the cluster that are running the zookeeper service.

Syntax

CLI

maprcli node listzookeepers
    [ -cluster <cluster name> ]
    [ -cldb  <cldb hostname|ip:port> ]

REST

http[s]://<host>:<port>/rest/node/listzookeepers?<parameters>

Parameters

Parameter	Description
cluster	The name of the cluster for which to return the list of zookeeper node hostnames.
cldb	The hostname or IP address and port number of a valid CLDB node. The other CLDB nodes and zookeeper nodes can be discovered from this node.

Examples

Return the list of zookeeper nodes for the cluster my.cluster.com

If you know that the CLDB service is running on a node with hostname host1, you can enter:

CLI

maprcli node listzookeepers -cluster my.cluster.com -cldb host1

REST

https://r1n1.sj.us:8443/rest/node/listzookeepers?cluster=my.cluster.com&cldb=host1