Package org.apache.hadoop.yarn.server.federation.resolver

Class DefaultSubClusterResolverImpl

java.lang.Object

org.apache.hadoop.yarn.server.federation.resolver.AbstractSubClusterResolver

org.apache.hadoop.yarn.server.federation.resolver.DefaultSubClusterResolverImpl

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, SubClusterResolver

public class DefaultSubClusterResolverImpl
extends AbstractSubClusterResolver
implements SubClusterResolver

Default simple sub-cluster and rack resolver class. This class expects a three-column comma separated file, specified in yarn.federation.machine-list. Each line of the file should be of the format: nodeName, subClusterId, rackName Lines that do not follow this format will be ignored. This resolver only loads the file when load() is explicitly called; it will not react to changes to the file. It is case-insensitive on the rack and node names and ignores leading/trailing whitespace.

Constructor Summary

Constructors

Constructor	Description
DefaultSubClusterResolverImpl()

Method Summary

Modifier and Type	Method	Description
org.apache.hadoop.conf.Configuration	getConf()
SubClusterId	getSubClusterForNode(java.lang.String nodename)	Obtain the sub-cluster that a specified node belongs to.
java.util.Set<SubClusterId>	getSubClustersForRack(java.lang.String rackname)	Obtain the sub-clusters that have nodes on a specified rack.
void	load()	Load the nodes to subCluster mapping from the file.
void	setConf(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class org.apache.hadoop.yarn.server.federation.resolver.AbstractSubClusterResolver

getNodeToSubCluster, getRackToSubClusters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultSubClusterResolverImpl

public DefaultSubClusterResolverImpl()

Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.conf.Configuration getConf()

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

getSubClusterForNode

public SubClusterId getSubClusterForNode(java.lang.String nodename)
                                  throws org.apache.hadoop.yarn.exceptions.YarnException

Description copied from interface: SubClusterResolver

Obtain the sub-cluster that a specified node belongs to.

Specified by:

getSubClusterForNode in interface SubClusterResolver

Overrides:

getSubClusterForNode in class AbstractSubClusterResolver

Parameters:

nodename - the node whose sub-cluster is to be determined

Returns:

the sub-cluster as identified by the SubClusterId that the node belongs to

Throws:

org.apache.hadoop.yarn.exceptions.YarnException - if the node's sub-cluster cannot be resolved

load

public void load()

Description copied from interface: SubClusterResolver

Load the nodes to subCluster mapping from the file.

Specified by:

load in interface SubClusterResolver

getSubClustersForRack

public java.util.Set<SubClusterId> getSubClustersForRack(java.lang.String rackname)
                                                  throws org.apache.hadoop.yarn.exceptions.YarnException

Description copied from interface: SubClusterResolver

Obtain the sub-clusters that have nodes on a specified rack.

Specified by:

getSubClustersForRack in interface SubClusterResolver

Overrides:

getSubClustersForRack in class AbstractSubClusterResolver

Parameters:

rackname - the name of the rack

Returns:

the sub-clusters as identified by the SubClusterId that have nodes on the given rack

Throws:

org.apache.hadoop.yarn.exceptions.YarnException - if the sub-cluster of any node on the rack cannot be resolved, or if the rack name is not recognized