yarn-default.xml
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yarn-default.xml
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			<?xml version="1.0"?>
			<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

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			<!-- wish to modify from this file into yarn-site.xml and change them -->
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			<configuration>

			<!-- IPC Configs -->
			<property>
			<description>Factory to create client IPC classes.</description>
			<name>yarn.ipc.client.factory.class</name>
			</property>

			<property>
			<description>Type of serialization to use.</description>
			<name>yarn.ipc.serializer.type</name>
			<value>protocolbuffers</value>
			</property>

			<property>
			<description>Factory to create server IPC classes.</description>
			<name>yarn.ipc.server.factory.class</name>
			</property>

			<property>
			<description>Factory to create IPC exceptions.</description>
			<name>yarn.ipc.exception.factory.class</name>
			</property>

			<property>
			<description>Factory to create serializeable records.</description>
			<name>yarn.ipc.record.factory.class</name>
			</property>

			<property>
			<description>RPC class implementation</description>
			<name>yarn.ipc.rpc.class</name>
			<value>org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC</value>
			</property>

			<!-- Resource Manager Configs -->
			<property>
			<description>The hostname of the RM.</description>
			<name>yarn.resourcemanager.hostname</name>
			<value>0.0.0.0</value>
			</property>

			<property>
			<description>The address of the applications manager interface in the RM.</description>
			<name>yarn.resourcemanager.address</name>
			<value>${yarn.resourcemanager.hostname}:8032</value>
			</property>

			<property>
			<description>The number of threads used to handle applications manager requests.</description>
			<name>yarn.resourcemanager.client.thread-count</name>
			<value>50</value>
			</property>

			<property>
			<description>The expiry interval for application master reporting.</description>
			<name>yarn.am.liveness-monitor.expiry-interval-ms</name>
			<value>600000</value>
			</property>

			<property>
			<description>The Kerberos principal for the resource manager.</description>
			<name>yarn.resourcemanager.principal</name>
			</property>

			<property>
			<description>The address of the scheduler interface.</description>
			<name>yarn.resourcemanager.scheduler.address</name>
			<value>${yarn.resourcemanager.hostname}:8030</value>
			</property>

			<property>
			<description>Number of threads to handle scheduler interface.</description>
			<name>yarn.resourcemanager.scheduler.client.thread-count</name>
			<value>50</value>
			</property>

			<property>
			<description>
			This configures the HTTP endpoint for Yarn Daemons.The following
			values are supported:
			- HTTP_ONLY : Service is provided only on http
			- HTTPS_ONLY : Service is provided only on https
			</description>
			<name>yarn.http.policy</name>
			<value>HTTP_ONLY</value>
			</property>

			<property>
			<description>The http address of the RM web application.</description>
			<name>yarn.resourcemanager.webapp.address</name>
			<value>${yarn.resourcemanager.hostname}:8088</value>
			</property>

			<property>
			<description>The https adddress of the RM web application.</description>
			<name>yarn.resourcemanager.webapp.https.address</name>
			<value>${yarn.resourcemanager.hostname}:8090</value>
			</property>

			<property>
			<name>yarn.resourcemanager.resource-tracker.address</name>
			<value>${yarn.resourcemanager.hostname}:8031</value>
			</property>

			<property>
			<description>Are acls enabled.</description>
			<name>yarn.acl.enable</name>
			<value>true</value>
			</property>

			<property>
			<description>ACL of who can be admin of the YARN cluster.</description>
			<name>yarn.admin.acl</name>
			<value>*</value>
			</property>

			<property>
			<description>The address of the RM admin interface.</description>
			<name>yarn.resourcemanager.admin.address</name>
			<value>${yarn.resourcemanager.hostname}:8033</value>
			</property>

			<property>
			<description>Number of threads used to handle RM admin interface.</description>
			<name>yarn.resourcemanager.admin.client.thread-count</name>
			<value>1</value>
			</property>

			<property>
			<description>How often should the RM check that the AM is still alive.</description>
			<name>yarn.resourcemanager.amliveliness-monitor.interval-ms</name>
			<value>1000</value>
			</property>

			<property>
			<description>Maximum time to wait to establish connection to
			ResourceManager.</description>
			<name>yarn.resourcemanager.connect.max-wait.ms</name>
			<value>900000</value>
			</property>

			<property>
			<description>How often to try connecting to the
			ResourceManager.</description>
			<name>yarn.resourcemanager.connect.retry-interval.ms</name>
			<value>30000</value>
			</property>

			<property>
			<description>The maximum number of application attempts. It's a global
			setting for all application masters. Each application master can specify
			its individual maximum number of application attempts via the API, but the
			individual number cannot be more than the global upper bound. If it is,
			the resourcemanager will override it. The default number is set to 2, to
			allow at least one retry for AM.</description>
			<name>yarn.resourcemanager.am.max-attempts</name>
			<value>2</value>
			</property>

			<property>
			<description>How often to check that containers are still alive. </description>
			<name>yarn.resourcemanager.container.liveness-monitor.interval-ms</name>
			<value>600000</value>
			</property>

			<property>
			<description>The keytab for the resource manager.</description>
			<name>yarn.resourcemanager.keytab</name>
			<value>/etc/krb5.keytab</value>
			</property>

			<property>
			<description>How long to wait until a node manager is considered dead.</description>
			<name>yarn.nm.liveness-monitor.expiry-interval-ms</name>
			<value>600000</value>
			</property>

			<property>
			<description>How often to check that node managers are still alive.</description>
			<name>yarn.resourcemanager.nm.liveness-monitor.interval-ms</name>
			<value>1000</value>
			</property>

			<property>
			<description>Path to file with nodes to include.</description>
			<name>yarn.resourcemanager.nodes.include-path</name>
			<value></value>
			</property>

			<property>
			<description>Path to file with nodes to exclude.</description>
			<name>yarn.resourcemanager.nodes.exclude-path</name>
			<value></value>
			</property>

			<property>
			<description>Number of threads to handle resource tracker calls.</description>
			<name>yarn.resourcemanager.resource-tracker.client.thread-count</name>
			<value>50</value>
			</property>

			<property>
			<description>The class to use as the resource scheduler.</description>
			<name>yarn.resourcemanager.scheduler.class</name>
			<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
			</property>

			<property>
			<description>The minimum allocation for every container request at the RM,
			in MBs. Memory requests lower than this won't take effect,
			and the specified value will get allocated at minimum.</description>
			<name>yarn.scheduler.minimum-allocation-mb</name>
			<value>1024</value>
			</property>

			<property>
			<description>The maximum allocation for every container request at the RM,
			in MBs. Memory requests higher than this won't take effect,
			and will get capped to this value.</description>
			<name>yarn.scheduler.maximum-allocation-mb</name>
			<value>8192</value>
			</property>

			<property>
			<description>The minimum allocation for every container request at the RM,
			in terms of virtual CPU cores. Requests lower than this won't take effect,
			and the specified value will get allocated the minimum.</description>
			<name>yarn.scheduler.minimum-allocation-vcores</name>
			<value>1</value>
			</property>

			<property>
			<description>The maximum allocation for every container request at the RM,
			in terms of virtual CPU cores. Requests higher than this won't take effect,
			and will get capped to this value.</description>
			<name>yarn.scheduler.maximum-allocation-vcores</name>
			<value>32</value>
			</property>

			<property>
			<description>Enable RM to recover state after starting. If true, then
			yarn.resourcemanager.store.class must be specified. </description>
			<name>yarn.resourcemanager.recovery.enabled</name>
			<value>false</value>
			</property>

			<property>
			<description>The class to use as the persistent store.

			If org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore
			is used, the store is implicitly fenced; meaning a single ResourceManager
			is able to use the store at any point in time. More details on this
			implicit fencing, along with setting up appropriate ACLs is discussed
			under yarn.resourcemanager.zk-state-store.root-node.acl.
			</description>
			<name>yarn.resourcemanager.store.class</name>
			<value>org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore</value>
			</property>

			<property>
			<description>The maximum number of completed applications RM state
			store keeps, less than or equals to ${yarn.resourcemanager.max-completed-applications}.
			By default, it equals to ${yarn.resourcemanager.max-completed-applications}.
			This ensures that the applications kept in the state store are consistent with
			the applications remembered in RM memory.
			Any values larger than ${yarn.resourcemanager.max-completed-applications} will
			be reset to ${yarn.resourcemanager.max-completed-applications}.
			Note that this value impacts the RM recovery performance.Typically,
			a smaller value indicates better performance on RM recovery.
			</description>
			<name>yarn.resourcemanager.state-store.max-completed-applications</name>
			<value>${yarn.resourcemanager.max-completed-applications}</value>
			</property>

			<property>
			<description>Host:Port of the ZooKeeper server to be used by the RM. This
			must be supplied when using the ZooKeeper based implementation of the
			RM state store and/or embedded automatic failover in a HA setting.
			</description>
			<name>yarn.resourcemanager.zk-address</name>
			<!--value>127.0.0.1:2181</value-->
			</property>

			<property>
			<description>Number of times RM tries to connect to ZooKeeper.</description>
			<name>yarn.resourcemanager.zk-num-retries</name>
			<value>500</value>
			</property>

			<property>
			<description>Retry interval in milliseconds when connecting to ZooKeeper.
			</description>
			<name>yarn.resourcemanager.zk-retry-interval-ms</name>
			<value>2000</value>
			</property>

			<property>
			<description>Full path of the ZooKeeper znode where RM state will be
			stored. This must be supplied when using
			org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore
			as the value for yarn.resourcemanager.store.class</description>
			<name>yarn.resourcemanager.zk-state-store.parent-path</name>
			<value>/rmstore</value>
			</property>

			<property>
			<description>ZooKeeper session timeout in milliseconds. Session expiration
			is managed by the ZooKeeper cluster itself, not by the client. This value is
			used by the cluster to determine when the client's session expires.
			Expirations happens when the cluster does not hear from the client within
			the specified session timeout period (i.e. no heartbeat).</description>
			<name>yarn.resourcemanager.zk-timeout-ms</name>
			<value>10000</value>
			</property>

			<property>
			<description>ACL's to be used for ZooKeeper znodes.</description>
			<name>yarn.resourcemanager.zk-acl</name>
			<value>world:anyone:rwcda</value>
			</property>

			<property>
			<description>
			ACLs to be used for the root znode when using ZKRMStateStore in a HA
			scenario for fencing.

			ZKRMStateStore supports implicit fencing to allow a single
			ResourceManager write-access to the store. For fencing, the
			ResourceManagers in the cluster share read-write-admin privileges on the
			root node, but the Active ResourceManager claims exclusive create-delete
			permissions.

			By default, when this property is not set, we use the ACLs from
			yarn.resourcemanager.zk-acl for shared admin access and
			rm-address:random-number for username-based exclusive create-delete
			access.

			This property allows users to set ACLs of their choice instead of using
			the default mechanism. For fencing to work, the ACLs should be
			carefully set differently on each ResourceManger such that all the
			ResourceManagers have shared admin access and the Active ResourceManger
			takes over (exclusively) the create-delete access.
			</description>
			<name>yarn.resourcemanager.zk-state-store.root-node.acl</name>
			</property>

			<property>
			<description>URI pointing to the location of the FileSystem path where
			RM state will be stored. This must be supplied when using
			org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore
			as the value for yarn.resourcemanager.store.class</description>
			<name>yarn.resourcemanager.fs.state-store.uri</name>
			<value>${hadoop.tmp.dir}/yarn/system/rmstore</value>
			<!--value>hdfs://localhost:9000/rmstore</value-->
			</property>

			<property>
			<description>hdfs client retry policy specification. hdfs client retry
			is always enabled. Specified in pairs of sleep-time and number-of-retries
			and (t0, n0), (t1, n1), ..., the first n0 retries sleep t0 milliseconds on
			average, the following n1 retries sleep t1 milliseconds on average, and so on.
			</description>
			<name>yarn.resourcemanager.fs.state-store.retry-policy-spec</name>
			<value>2000, 500</value>
			</property>

			<property>
			<description>Enable RM high-availability. When enabled,
			(1) The RM starts in the Standby mode by default, and transitions to
			the Active mode when prompted to.
			(2) The nodes in the RM ensemble are listed in
			yarn.resourcemanager.ha.rm-ids
			(3) The id of each RM comes from yarn.resourcemanager.ha.id
			(4) The actual physical addresses come from the configs of the pattern
			- {rpc-config}.{id}</description>
			<name>yarn.resourcemanager.ha.enabled</name>
			<value>false</value>
			</property>

			<property>
			<description>Enable automatic failover.</description>
			<name>yarn.resourcemanager.ha.automatic-failover.enabled</name>
			<value>false</value>
			</property>

			<property>
			<description>Enable embedded automatic failover. The embedded elector
			relies on the RM state store to handle fencing, and is primarily intended
			to be used in conjunction with ZKRMStateStore.</description>
			<name>yarn.resourcemanager.ha.automatic-failover.embedded</name>
			<value>false</value>
			</property>

			<property>
			<description>The base znode path to use for storing leader information,
			when using ZooKeeper based leader election.</description>
			<name>yarn.resourcemanager.ha.automatic-failover.zk-base-path</name>
			<value>/yarn-leader-election</value>
			</property>

			<property>
			<description>Name of the cluster. In a HA setting,
			this is used to ensure the RM participates in leader
			election fo this cluster and ensures it does not affect
			other clusters</description>
			<name>yarn.resourcemanager.cluster-id</name>
			<!--value>yarn-cluster</value-->
			</property>

			<property>
			<description>The list of RM nodes in the cluster when HA is
			enabled. See description of yarn.resourcemanager.ha
			.enabled for full details on how this is used.</description>
			<name>yarn.resourcemanager.ha.rm-ids</name>
			<!--value>rm1,rm2</value-->
			</property>

			<property>
			<description>The id (string) of the current RM. When HA is enabled, this
			is a required config. See description of yarn.resourcemanager.ha.enabled
			for full details on how this is used.</description>
			<name>yarn.resourcemanager.ha.id</name>
			<!--value>rm1</value-->
			</property>

			<property>
			<description>When HA is enabled, the class to be used by Clients, AMs and
			NMs to failover to the Active RM. It should extend
			org.apache.hadoop.yarn.client.RMFailoverProxyProvider</description>
			<name>yarn.client.failover-proxy-provider</name>
			<value>org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider</value>
			</property>

			<property>
			<description>When HA is enabled, the max number of times
			FailoverProxyProvider should attempt failover. When set,
			this overrides the yarn.resourcemanager.connect.max-wait.ms. When
			not set, this is inferred from
			yarn.resourcemanager.connect.max-wait.ms.</description>
			<name>yarn.client.failover-max-attempts</name>
			<!--value>15</value-->
			</property>

			<property>
			<description>When HA is enabled, the sleep base (in milliseconds) to be
			used for calculating the exponential delay between failovers. When set,
			this overrides the yarn.resourcemanager.connect.* settings. When
			not set, yarn.resourcemanager.connect.retry-interval.ms is used instead.
			</description>
			<name>yarn.client.failover-sleep-base-ms</name>
			<!--value>500</value-->
			</property>

			<property>
			<description>When HA is enabled, the maximum sleep time (in milliseconds)
			between failovers. When set, this overrides the
			yarn.resourcemanager.connect.* settings. When not set,
			yarn.resourcemanager.connect.retry-interval.ms is used instead.</description>
			<name>yarn.client.failover-sleep-max-ms</name>
			<!--value>15000</value-->
			</property>

			<property>
			<description>When HA is enabled, the number of retries per
			attempt to connect to a ResourceManager. In other words,
			it is the ipc.client.connect.max.retries to be used during
			failover attempts</description>
			<name>yarn.client.failover-retries</name>
			<value>0</value>
			</property>

			<property>
			<description>When HA is enabled, the number of retries per
			attempt to connect to a ResourceManager on socket timeouts. In other
			words, it is the ipc.client.connect.max.retries.on.timeouts to be used
			during failover attempts</description>
			<name>yarn.client.failover-retries-on-socket-timeouts</name>
			<value>0</value>
			</property>

			<property>
			<description>The maximum number of completed applications RM keeps. </description>
			<name>yarn.resourcemanager.max-completed-applications</name>
			<value>10000</value>
			</property>

			<property>
			<description>Interval at which the delayed token removal thread runs</description>
			<name>yarn.resourcemanager.delayed.delegation-token.removal-interval-ms</name>
			<value>30000</value>
			</property>

			<property>
			<description>Interval for the roll over for the master key used to generate
			application tokens
			</description>
			<name>yarn.resourcemanager.application-tokens.master-key-rolling-interval-secs</name>
			<value>86400</value>
			</property>

			<property>
			<description>Interval for the roll over for the master key used to generate
			container tokens. It is expected to be much greater than
			yarn.nm.liveness-monitor.expiry-interval-ms and
			yarn.rm.container-allocation.expiry-interval-ms. Otherwise the
			behavior is undefined.
			</description>
			<name>yarn.resourcemanager.container-tokens.master-key-rolling-interval-secs</name>
			<value>86400</value>
			</property>

			<property>
			<description>The heart-beat interval in milliseconds for every NodeManager in the cluster.</description>
			<name>yarn.resourcemanager.nodemanagers.heartbeat-interval-ms</name>
			<value>1000</value>
			</property>

			<property>
			<description>The minimum allowed version of a connecting nodemanager. The valid values are
			NONE (no version checking), EqualToRM (the nodemanager's version is equal to
			or greater than the RM version), or a Version String.</description>
			<name>yarn.resourcemanager.nodemanager.minimum.version</name>
			<value>NONE</value>
			</property>

			<property>
			<description>Enable a set of periodic monitors (specified in
			yarn.resourcemanager.scheduler.monitor.policies) that affect the
			scheduler.</description>
			<name>yarn.resourcemanager.scheduler.monitor.enable</name>
			<value>false</value>
			</property>

			<property>
			<description>The list of SchedulingEditPolicy classes that interact with
			the scheduler. A particular module may be incompatible with the
			scheduler, other policies, or a configuration of either.</description>
			<name>yarn.resourcemanager.scheduler.monitor.policies</name>
			<value>org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy</value>
			</property>

			<!-- Node Manager Configs -->
			<property>
			<description>The hostname of the NM.</description>
			<name>yarn.nodemanager.hostname</name>
			<value>0.0.0.0</value>
			</property>

			<property>
			<description>The address of the container manager in the NM.</description>
			<name>yarn.nodemanager.address</name>
			<value>${yarn.nodemanager.hostname}:0</value>
			</property>

			<property>
			<description>Environment variables that should be forwarded from the NodeManager's environment to the container's.</description>
			<name>yarn.nodemanager.admin-env</name>
			<value>MALLOC_ARENA_MAX=$MALLOC_ARENA_MAX</value>
			</property>

			<property>
			<description>Environment variables that containers may override rather than use NodeManager's default.</description>
			<name>yarn.nodemanager.env-whitelist</name>
			<value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,HADOOP_YARN_HOME</value>
			</property>

			<property>
			<description>who will execute(launch) the containers.</description>
			<name>yarn.nodemanager.container-executor.class</name>
			<value>org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor</value>
			<!--<value>org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor</value>-->
			</property>

			<property>
			<description>Number of threads container manager uses.</description>
			<name>yarn.nodemanager.container-manager.thread-count</name>
			<value>20</value>
			</property>

			<property>
			<description>Number of threads used in cleanup.</description>
			<name>yarn.nodemanager.delete.thread-count</name>
			<value>4</value>
			</property>

			<property>
			<description>
			Number of seconds after an application finishes before the nodemanager's
			DeletionService will delete the application's localized file directory
			and log directory.

			To diagnose Yarn application problems, set this property's value large
			enough (for example, to 600 = 10 minutes) to permit examination of these
			directories. After changing the property's value, you must restart the
			nodemanager in order for it to have an effect.

			The roots of Yarn applications' work directories is configurable with
			the yarn.nodemanager.local-dirs property (see below), and the roots
			of the Yarn applications' log directories is configurable with the
			yarn.nodemanager.log-dirs property (see also below).
			</description>
			<name>yarn.nodemanager.delete.debug-delay-sec</name>
			<value>0</value>
			</property>

			<property>
			<description>Keytab for NM.</description>
			<name>yarn.nodemanager.keytab</name>
			<value>/etc/krb5.keytab</value>
			</property>

			<property>
			<description>List of directories to store localized files in. An
			application's localized file directory will be found in:
			${yarn.nodemanager.local-dirs}/usercache/${user}/appcache/application_${appid}.
			Individual containers' work directories, called container_${contid}, will
			be subdirectories of this.
			</description>
			<name>yarn.nodemanager.local-dirs</name>
			<value>${hadoop.tmp.dir}/nm-local-dir</value>
			</property>

			<property>
			<description>It limits the maximum number of files which will be localized
			in a single local directory. If the limit is reached then sub-directories
			will be created and new files will be localized in them. If it is set to
			a value less than or equal to 36 [which are sub-directories (0-9 and then
			a-z)] then NodeManager will fail to start. For example; [for public
			cache] if this is configured with a value of 40 ( 4 files +
			36 sub-directories) and the local-dir is "/tmp/local-dir1" then it will
			allow 4 files to be created directly inside "/tmp/local-dir1/filecache".
			For files that are localized further it will create a sub-directory "0"
			inside "/tmp/local-dir1/filecache" and will localize files inside it
			until it becomes full. If a file is removed from a sub-directory that
			is marked full, then that sub-directory will be used back again to
			localize files.
			</description>
			<name>yarn.nodemanager.local-cache.max-files-per-directory</name>
			<value>8192</value>
			</property>

			<property>
			<description>Address where the localizer IPC is.</description>
			<name>yarn.nodemanager.localizer.address</name>
			<value>${yarn.nodemanager.hostname}:8040</value>
			</property>

			<property>
			<description>Interval in between cache cleanups.</description>
			<name>yarn.nodemanager.localizer.cache.cleanup.interval-ms</name>
			<value>600000</value>
			</property>

			<property>
			<description>Target size of localizer cache in MB, per local directory.</description>
			<name>yarn.nodemanager.localizer.cache.target-size-mb</name>
			<value>10240</value>
			</property>

			<property>
			<description>Number of threads to handle localization requests.</description>
			<name>yarn.nodemanager.localizer.client.thread-count</name>
			<value>5</value>
			</property>

			<property>
			<description>Number of threads to use for localization fetching.</description>
			<name>yarn.nodemanager.localizer.fetch.thread-count</name>
			<value>4</value>
			</property>

			<property>
			<description>
			Where to store container logs. An application's localized log directory
			will be found in ${yarn.nodemanager.log-dirs}/application_${appid}.
			Individual containers' log directories will be below this, in directories
			named container_{$contid}. Each container directory will contain the files
			stderr, stdin, and syslog generated by that container.
			</description>
			<name>yarn.nodemanager.log-dirs</name>
			<value>${yarn.log.dir}/userlogs</value>
			</property>

			<property>
			<description>Whether to enable log aggregation</description>
			<name>yarn.log-aggregation-enable</name>
			<value>false</value>
			</property>

			<property>
			<description>How long to keep aggregation logs before deleting them. -1 disables.
			Be careful set this too small and you will spam the name node.</description>
			<name>yarn.log-aggregation.retain-seconds</name>
			<value>-1</value>
			</property>

			<property>
			<description>How long to wait between aggregated log retention checks.
			If set to 0 or a negative value then the value is computed as one-tenth
			of the aggregated log retention time. Be careful set this too small and
			you will spam the name node.</description>
			<name>yarn.log-aggregation.retain-check-interval-seconds</name>
			<value>-1</value>
			</property>

			<property>
			<description>Time in seconds to retain user logs. Only applicable if
			log aggregation is disabled
			</description>
			<name>yarn.nodemanager.log.retain-seconds</name>
			<value>10800</value>
			</property>

			<property>
			<description>Where to aggregate logs to.</description>
			<name>yarn.nodemanager.remote-app-log-dir</name>
			<value>/tmp/logs</value>
			</property>
			<property>
			<description>The remote log dir will be created at
			{yarn.nodemanager.remote-app-log-dir}/${user}/{thisParam}
			</description>
			<name>yarn.nodemanager.remote-app-log-dir-suffix</name>
			<value>logs</value>
			</property>

			<property>
			<description>Amount of physical memory, in MB, that can be allocated
			for containers.</description>
			<name>yarn.nodemanager.resource.memory-mb</name>
			<value>8192</value>
			</property>

			<property>
			<description>Whether physical memory limits will be enforced for
			containers.</description>
			<name>yarn.nodemanager.pmem-check-enabled</name>
			<value>true</value>
			</property>

			<property>
			<description>Whether virtual memory limits will be enforced for
			containers.</description>
			<name>yarn.nodemanager.vmem-check-enabled</name>
			<value>true</value>
			</property>

			<property>
			<description>Ratio between virtual memory to physical memory when
			setting memory limits for containers. Container allocations are
			expressed in terms of physical memory, and virtual memory usage
			is allowed to exceed this allocation by this ratio.
			</description>
			<name>yarn.nodemanager.vmem-pmem-ratio</name>
			<value>2.1</value>
			</property>

			<property>
			<description>Number of CPU cores that can be allocated
			for containers.</description>
			<name>yarn.nodemanager.resource.cpu-vcores</name>
			<value>8</value>
			</property>

			<property>
			<description>NM Webapp address.</description>
			<name>yarn.nodemanager.webapp.address</name>
			<value>${yarn.nodemanager.hostname}:8042</value>
			</property>

			<property>
			<description>How often to monitor containers.</description>
			<name>yarn.nodemanager.container-monitor.interval-ms</name>
			<value>3000</value>
			</property>

			<property>
			<description>Class that calculates containers current resource utilization.</description>
			<name>yarn.nodemanager.container-monitor.resource-calculator.class</name>
			</property>

			<property>
			<description>Frequency of running node health script.</description>
			<name>yarn.nodemanager.health-checker.interval-ms</name>
			<value>600000</value>
			</property>

			<property>
			<description>Script time out period.</description>
			<name>yarn.nodemanager.health-checker.script.timeout-ms</name>
			<value>1200000</value>
			</property>

			<property>
			<description>The health check script to run.</description>
			<name>yarn.nodemanager.health-checker.script.path</name>
			<value></value>
			</property>

			<property>
			<description>The arguments to pass to the health check script.</description>
			<name>yarn.nodemanager.health-checker.script.opts</name>
			<value></value>
			</property>

			<property>
			<description>Frequency of running disk health checker code.</description>
			<name>yarn.nodemanager.disk-health-checker.interval-ms</name>
			<value>120000</value>
			</property>

			<property>
			<description>The minimum fraction of number of disks to be healthy for the
			nodemanager to launch new containers. This correspond to both
			yarn-nodemanager.local-dirs and yarn.nodemanager.log-dirs. i.e. If there
			are less number of healthy local-dirs (or log-dirs) available, then
			new containers will not be launched on this node.</description>
			<name>yarn.nodemanager.disk-health-checker.min-healthy-disks</name>
			<value>0.25</value>
			</property>

			<property>
			<description>The path to the Linux container executor.</description>
			<name>yarn.nodemanager.linux-container-executor.path</name>
			</property>

			<property>
			<description>The class which should help the LCE handle resources.</description>
			<name>yarn.nodemanager.linux-container-executor.resources-handler.class</name>
			<value>org.apache.hadoop.yarn.server.nodemanager.util.DefaultLCEResourcesHandler</value>
			<!-- <value>org.apache.hadoop.yarn.server.nodemanager.util.CgroupsLCEResourcesHandler</value> -->
			</property>

			<property>
			<description>The cgroups hierarchy under which to place YARN proccesses (cannot contain commas).
			If yarn.nodemanager.linux-container-executor.cgroups.mount is false (that is, if cgroups have
			been pre-configured), then this cgroups hierarchy must already exist and be writable by the
			NodeManager user, otherwise the NodeManager may fail.
			Only used when the LCE resources handler is set to the CgroupsLCEResourcesHandler.</description>
			<name>yarn.nodemanager.linux-container-executor.cgroups.hierarchy</name>
			<value>/hadoop-yarn</value>
			</property>

			<property>
			<description>Whether the LCE should attempt to mount cgroups if not found.
			Only used when the LCE resources handler is set to the CgroupsLCEResourcesHandler.</description>
			<name>yarn.nodemanager.linux-container-executor.cgroups.mount</name>
			<value>false</value>
			</property>

			<property>
			<description>Where the LCE should attempt to mount cgroups if not found. Common locations
			include /sys/fs/cgroup and /cgroup; the default location can vary depending on the Linux
			distribution in use. This path must exist before the NodeManager is launched.
			Only used when the LCE resources handler is set to the CgroupsLCEResourcesHandler, and
			yarn.nodemanager.linux-container-executor.cgroups.mount is true.</description>
			<name>yarn.nodemanager.linux-container-executor.cgroups.mount-path</name>
			</property>

			<property>
			<description>The UNIX user that containers will run as when Linux-container-executor
			is used in nonsecure mode (a use case for this is using cgroups).</description>
			<name>yarn.nodemanager.linux-container-executor.nonsecure-mode.local-user</name>
			<value>nobody</value>
			</property>

			<property>
			<description>The allowed pattern for UNIX user names enforced by
			Linux-container-executor when used in nonsecure mode (use case for this
			is using cgroups). The default value is taken from /usr/sbin/adduser</description>
			<name>yarn.nodemanager.linux-container-executor.nonsecure-mode.user-pattern</name>
			<value>^[_.A-Za-z0-9][-@_.A-Za-z0-9]{0,255}?[$]?$</value>
			</property>

			<property>
			<description>T-file compression types used to compress aggregated logs.</description>
			<name>yarn.nodemanager.log-aggregation.compression-type</name>
			<value>none</value>
			</property>

			<property>
			<description>The kerberos principal for the node manager.</description>
			<name>yarn.nodemanager.principal</name>
			<value></value>
			</property>

			<property>
			<description>the valid service name should only contain a-zA-Z0-9_ and can not start with numbers</description>
			<name>yarn.nodemanager.aux-services</name>
			<value></value>
			<!--<value>mapreduce_shuffle</value>-->
			</property>

			<property>
			<description>No. of ms to wait between sending a SIGTERM and SIGKILL to a container</description>
			<name>yarn.nodemanager.sleep-delay-before-sigkill.ms</name>
			<value>250</value>
			</property>

			<property>
			<description>Max time to wait for a process to come up when trying to cleanup a container</description>
			<name>yarn.nodemanager.process-kill-wait.ms</name>
			<value>2000</value>
			</property>

			<property>
			<description>Max time, in seconds, to wait to establish a connection to RM when NM starts.
			The NM will shutdown if it cannot connect to RM within the specified max time period.
			If the value is set as -1, then NM will retry forever.</description>
			<name>yarn.nodemanager.resourcemanager.connect.wait.secs</name>
			<value>900</value>
			</property>

			<property>
			<description>Time interval, in seconds, between each NM attempt to connect to RM.</description>
			<name>yarn.nodemanager.resourcemanager.connect.retry_interval.secs</name>
			<value>30</value>
			</property>

			<property>
			<description>The minimum allowed version of a resourcemanager that a nodemanager will connect to.
			The valid values are NONE (no version checking), EqualToNM (the resourcemanager's version is
			equal to or greater than the NM version), or a Version String.</description>
			<name>yarn.nodemanager.resourcemanager.minimum.version</name>
			<value>NONE</value>
			</property>

			<property>
			<description>Max number of threads in NMClientAsync to process container
			management events</description>
			<name>yarn.client.nodemanager-client-async.thread-pool-max-size</name>
			<value>500</value>
			</property>

			<property>
			<description>
			Maximum number of proxy connections for node manager. It should always be
			more than 1. NMClient and MRAppMaster will use this to cache connection
			with node manager. There will be at max one connection per node manager.
			Ex. configuring it to a value of 5 will make sure that client will at
			max have 5 connections cached with 5 different node managers. These
			connections will be timed out if idle for more than system wide idle
			timeout period. The token if used for authentication then it will be used
			only at connection creation time. If new token is received then earlier
			connection should be closed in order to use newer token. This and
			(yarn.client.nodemanager-client-async.thread-pool-max-size) are related
			and should be sync (no need for them to be equal).
			</description>
			<name>yarn.client.max-nodemanagers-proxies</name>
			<value>500</value>
			</property>

			<!--Map Reduce configuration-->
			<property>
			<name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
			<value>org.apache.hadoop.mapred.ShuffleHandler</value>
			</property>

			<property>
			<name>mapreduce.job.jar</name>
			<value/>
			</property>

			<property>
			<name>mapreduce.job.hdfs-servers</name>
			<value>${fs.defaultFS}</value>
			</property>

			<!-- WebAppProxy Configuration-->

			<property>
			<description>The kerberos principal for the proxy, if the proxy is not
			running as part of the RM.</description>
			<name>yarn.web-proxy.principal</name>
			<value/>
			</property>

			<property>
			<description>Keytab for WebAppProxy, if the proxy is not running as part of
			the RM.</description>
			<name>yarn.web-proxy.keytab</name>
			</property>

			<property>
			<description>The address for the web proxy as HOST:PORT, if this is not
			given then the proxy will run as part of the RM</description>
			<name>yarn.web-proxy.address</name>
			<value/>
			</property>

			<!-- Applications' Configuration-->

			<property>
			<description>
			CLASSPATH for YARN applications. A comma-separated list
			of CLASSPATH entries. When this value is empty, the following default
			CLASSPATH for YARN applications would be used.
			For Linux:
			$HADOOP_CONF_DIR,
			$HADOOP_COMMON_HOME/share/hadoop/common/*,
			$HADOOP_COMMON_HOME/share/hadoop/common/lib/*,
			$HADOOP_HDFS_HOME/share/hadoop/hdfs/*,
			$HADOOP_HDFS_HOME/share/hadoop/hdfs/lib/*,
			$HADOOP_YARN_HOME/share/hadoop/yarn/*,
			$HADOOP_YARN_HOME/share/hadoop/yarn/lib/*
			For Windows:
			%HADOOP_CONF_DIR%,
			%HADOOP_COMMON_HOME%/share/hadoop/common/*,
			%HADOOP_COMMON_HOME%/share/hadoop/common/lib/*,
			%HADOOP_HDFS_HOME%/share/hadoop/hdfs/*,
			%HADOOP_HDFS_HOME%/share/hadoop/hdfs/lib/*,
			%HADOOP_YARN_HOME%/share/hadoop/yarn/*,
			%HADOOP_YARN_HOME%/share/hadoop/yarn/lib/*
			</description>
			<name>yarn.application.classpath</name>
			<value></value>
			</property>

			<!-- Other configuration -->
			<property>
			<description>The interval that the yarn client library uses to poll the
			completion status of the asynchronous API of application client protocol.
			</description>
			<name>yarn.client.application-client-protocol.poll-interval-ms</name>
			<value>200</value>
			</property>
			</configuration>

R3704/2.3.0/hadoop-2.3.0/share/hadoop/hadoop-yarn/hadoop-yarn-common/yarn-default.xml6c2cef95801efuture

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R3704/2.3.0/hadoop-2.3.0/share/hadoop/hadoop-yarn/hadoop-yarn-common/yarn-default.xml
6c2cef95801efuture

yarn-default.xml
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