YARN Commands

Overview

YARN commands are invoked by the bin/yarn script. Running the yarn script without any arguments prints the description for all commands.

Usage: yarn [SHELL_OPTIONS] COMMAND [GENERIC_OPTIONS] [COMMAND_OPTIONS]

YARN has an option parsing framework that employs parsing generic options as well as running classes.

COMMAND_OPTIONS Description
SHELL_OPTIONS The common set of shell options. These are documented on the Commands Manual page.
GENERIC_OPTIONS The common set of options supported by multiple commands. See the Hadoop Commands Manual for more information.
COMMAND COMMAND_OPTIONS Various commands with their options are described in the following sections. The commands have been grouped into User Commands and Administration Commands.

User Commands

Commands useful for users of a Hadoop cluster.

application

Usage: yarn application [options]

COMMAND_OPTIONS Description
-appId <ApplicationId> Specify Application Id to be operated
-appStates <States> Works with -list to filter applications based on input comma-separated list of application states. The valid application state can be one of the following:  ALL, NEW, NEW_SAVING, SUBMITTED, ACCEPTED, RUNNING, FINISHED, FAILED, KILLED
-appTypes <Types> Works with -list to filter applications based on input comma-separated list of application types.
-help Help
-list Lists applications from the RM. Supports optional use of -appTypes to filter applications based on application type, and -appStates to filter applications based on application state.
-kill <ApplicationId> Kills the application.
-movetoqueue <Application Id> Moves the application to a different queue.
-queue <Queue Name> Works with the movetoqueue command to specify which queue to move an application to.
-status <ApplicationId> Prints the status of the application.
-updateLifetime <Timeout> Update application timeout (from the time of request) in seconds. ApplicationId can be specified using ‘appId’ option.
-updatePriority <Priority> Update priority of an application. ApplicationId can be passed using ‘appId’ option.

Prints application(s) report/kill application

applicationattempt

Usage: yarn applicationattempt [options]

COMMAND_OPTIONS Description
-help Help
-list <ApplicationId> Lists applications attempts for the given application.
-status <Application Attempt Id> Prints the status of the application attempt.

prints applicationattempt(s) report

classpath

Usage: yarn classpath [--glob |--jar <path> |-h |--help]

COMMAND_OPTION Description
--glob expand wildcards
--jar path write classpath as manifest in jar named path
-h, --help print help

Prints the class path needed to get the Hadoop jar and the required libraries. If called without arguments, then prints the classpath set up by the command scripts, which is likely to contain wildcards in the classpath entries. Additional options print the classpath after wildcard expansion or write the classpath into the manifest of a jar file. The latter is useful in environments where wildcards cannot be used and the expanded classpath exceeds the maximum supported command line length.

container

Usage: yarn container [options]

COMMAND_OPTIONS Description
-help Help
-list <Application Attempt Id> Lists containers for the application attempt.
-status <ContainerId> Prints the status of the container.

prints container(s) report

jar

Usage: yarn jar <jar> [mainClass] args...

Runs a jar file. Users can bundle their YARN code in a jar file and execute it using this command.

logs

Usage: yarn logs -applicationId <application ID> [options]

COMMAND_OPTIONS Description
-applicationId <application ID> Specifies an application id
-appOwner <AppOwner> AppOwner (assumed to be current user if not specified)
-containerId <ContainerId> ContainerId (must be specified if node address is specified)
-help Help
-nodeAddress <NodeAddress> NodeAddress in the format nodename:port (must be specified if container id is specified)

Dump the container logs

node

Usage: yarn node [options]

COMMAND_OPTIONS Description
-all Works with -list to list all nodes.
-list Lists all running nodes. Supports optional use of -states to filter nodes based on node state, and -all to list all nodes.
-states <States> Works with -list to filter nodes based on input comma-separated list of node states.
-status <NodeId> Prints the status report of the node.

Prints node report(s)

queue

Usage: yarn queue [options]

COMMAND_OPTIONS Description
-help Help
-status <QueueName> Prints the status of the queue.

Prints queue information

version

Usage: yarn version

Prints the Hadoop version.

envvars

Usage: yarn envvars

Display computed Hadoop environment variables.

Administration Commands

Commands useful for administrators of a Hadoop cluster.

daemonlog

Get/Set the log level for a Log identified by a qualified class name in the daemon dynamically. See the Hadoop Commands Manual for more information.

nodemanager

Usage: yarn nodemanager

Start the NodeManager

proxyserver

Usage: yarn proxyserver

Start the web proxy server

resourcemanager

Usage: yarn resourcemanager [-format-state-store]

COMMAND_OPTIONS Description
-format-state-store Formats the RMStateStore. This will clear the RMStateStore and is useful if past applications are no longer needed. This should be run only when the ResourceManager is not running.
-remove-application-from-state-store <appId> Remove the application from RMStateStore. This should be run only when the ResourceManager is not running.

Start the ResourceManager

rmadmin

Usage:

  Usage: yarn rmadmin
     -refreshQueues
     -refreshNodes [-g|graceful [timeout in seconds] -client|server]
     -refreshNodesResources
     -refreshSuperUserGroupsConfiguration
     -refreshUserToGroupsMappings
     -refreshAdminAcls
     -refreshServiceAcl
     -getGroups [username]
     -addToClusterNodeLabels <"label1(exclusive=true),label2(exclusive=false),label3">
     -removeFromClusterNodeLabels <label1,label2,label3> (label splitted by ",")
     -replaceLabelsOnNode <"node1[:port]=label1,label2 node2[:port]=label1,label2"> [-failOnUnknownNodes]
     -directlyAccessNodeLabelStore
     -refreshClusterMaxPriority
     -updateNodeResource [NodeID] [MemSize] [vCores] ([OvercommitTimeout]) or -updateNodeResource [NodeID] [ResourceTypes] ([OvercommitTimeout])
     -transitionToActive [--forceactive] <serviceId>
     -transitionToStandby <serviceId>
     -failover [--forcefence] [--forceactive] <serviceId> <serviceId>
     -getServiceState <serviceId>
     -getAllServiceState
     -checkHealth <serviceId>
     -help [cmd]
COMMAND_OPTIONS Description
-refreshQueues Reload the queues’ acls, states and scheduler specific properties. ResourceManager will reload the mapred-queues configuration file.
-refreshNodes [-g|graceful [timeout in seconds] -client|server] Refresh the hosts information at the ResourceManager. Here [-g|graceful [timeout in seconds] -client|server] is optional, if we specify the timeout then ResourceManager will wait for timeout before marking the NodeManager as decommissioned. The -client|server indicates if the timeout tracking should be handled by the client or the ResourceManager. The client-side tracking is blocking, while the server-side tracking is not. Omitting the timeout, or a timeout of -1, indicates an infinite timeout. Known Issue: the server-side tracking will immediately decommission if an RM HA failover occurs.
-refreshNodesResources Refresh resources of NodeManagers at the ResourceManager.
-refreshSuperUserGroupsConfiguration Refresh superuser proxy groups mappings.
-refreshUserToGroupsMappings Refresh user-to-groups mappings.
-refreshAdminAcls Refresh acls for administration of ResourceManager
-refreshServiceAcl Reload the service-level authorization policy file ResourceManager will reload the authorization policy file.
-getGroups [username] Get groups the specified user belongs to.
-addToClusterNodeLabels <“label1(exclusive=true),label2(exclusive=false),label3”> Add to cluster node labels. Default exclusivity is true.
-removeFromClusterNodeLabels <label1,label2,label3> (label splitted by “,”) Remove from cluster node labels.
-replaceLabelsOnNode <“node1[:port]=label1,label2 node2[:port]=label1,label2”> [-failOnUnknownNodes] Replace labels on nodes (please note that we do not support specifying multiple labels on a single host for now.) -failOnUnknownNodes is optional, when we set this option, it will fail if specified nodes are unknown.
-directlyAccessNodeLabelStore This is DEPRECATED, will be removed in future releases. Directly access node label store, with this option, all node label related operations will not connect RM. Instead, they will access/modify stored node labels directly. By default, it is false (access via RM). AND PLEASE NOTE: if you configured yarn.node-labels.fs-store.root-dir to a local directory (instead of NFS or HDFS), this option will only work when the command run on the machine where RM is running.
-refreshClusterMaxPriority Refresh cluster max priority
-updateNodeResource [NodeID] [MemSize] [vCores] ([OvercommitTimeout]) Update resource on specific node.
-updateNodeResource [NodeID] [ResourceTypes] ([OvercommitTimeout]) Update resource types on specific node. Resource Types is comma-delimited key value pairs of any resources availale at Resource Manager. For example, memory-mb=1024Mi,vcores=1,resource1=2G,resource2=4m
-transitionToActive [–forceactive] [–forcemanual] <serviceId> Transitions the service into Active state. Try to make the target active without checking that there is no active node if the –forceactive option is used. This command can not be used if automatic failover is enabled. Though you can override this by –forcemanual option, you need caution. This command can not be used if automatic failover is enabled.
-transitionToStandby [–forcemanual] <serviceId> Transitions the service into Standby state. This command can not be used if automatic failover is enabled. Though you can override this by –forcemanual option, you need caution.
-failover [–forceactive] <serviceId1> <serviceId2> Initiate a failover from serviceId1 to serviceId2. Try to failover to the target service even if it is not ready if the –forceactive option is used. This command can not be used if automatic failover is enabled.
-getServiceState <serviceId> Returns the state of the service.
-getAllServiceState Returns the state of all the services.
-checkHealth <serviceId> Requests that the service perform a health check. The RMAdmin tool will exit with a non-zero exit code if the check fails.
-help [cmd] Displays help for the given command or all commands if none is specified.

Runs ResourceManager admin client

schedulerconf

Usage: yarn schedulerconf [options]

COMMAND_OPTIONS Description
-add <“queuePath1:key1=val1,key2=val2;queuePath2:key3=val3”> Semicolon separated values of queues to add and their queue configurations. This example adds queue “queuePath1” (a full path name), which has queue configurations key1=val1 and key2=val2. It also adds queue “queuePath2”, which has queue configuration key3=val3.
-remove <“queuePath1;queuePath2”> Semicolon separated queues to remove. This example removes queuePath1 and queuePath2 queues (full path names). Note: Queues must be put into STOPPED state before they are deleted.
-update <“queuePath1:key1=val1,key2=val2;queuePath2:key3=val3”> Semicolon separated values of queues whose configurations should be updated. This example sets key1=val1 and key2=val2 for queue configuration of queuePath1 (full path name), and sets key3=val3 for queue configuration of queuePath2.
-global <key1=val1,key2=val2> Update scheduler global configurations. This example sets key1=val1 and key2=val2 for scheduler’s global configuration.

Updates scheduler configuration. Note, this feature is in alpha phase and is subject to change.

scmadmin

Usage: yarn scmadmin [options]

COMMAND_OPTIONS Description
-help Help
-runCleanerTask Runs the cleaner task

Runs Shared Cache Manager admin client

sharedcachemanager

Usage: yarn sharedcachemanager

Start the Shared Cache Manager

timelineserver

Usage: yarn timelineserver

Start the TimeLineServer

Files

File Description
etc/hadoop/hadoop-env.sh This file stores the global settings used by all Hadoop shell commands.
etc/hadoop/yarn-env.sh This file stores overrides used by all YARN shell commands.
etc/hadoop/hadoop-user-functions.sh This file allows for advanced users to override some shell functionality.
~/.hadooprc This stores the personal environment for an individual user. It is processed after the hadoop-env.sh, hadoop-user-functions.sh, and yarn-env.sh files and can contain the same settings.