org.apache.hadoop.yarn.api.protocolrecords
Interface AllocateResponse

@InterfaceAudience.Public
@InterfaceStability.Stable
public interface AllocateResponse

The response sent by the ResourceManager the ApplicationMaster during resource negotiation.

The response, via AMResponse, includes:

• Response ID to track duplicate responses.
• A reboot flag to let the ApplicationMaster know that its horribly out of sync and needs to reboot.
• A list of newly allocated Container.
• A list of completed Container.
• The available headroom for resources in the cluster for the application.

See Also:

AMRMProtocol.allocate(AllocateRequest)

Method Summary

AMResponse	getAMResponse() Get the AMResponse sent by the ResourceManager.
int	getNumClusterNodes() Get the number of hosts available on the cluster.

Method Detail

getAMResponse

@InterfaceAudience.Public
@InterfaceStability.Stable
AMResponse getAMResponse()

Get the AMResponse sent by the ResourceManager.

Returns:

AMResponse sent by the ResourceManager

getNumClusterNodes

@InterfaceAudience.Public
@InterfaceStability.Stable
int getNumClusterNodes()

Get the number of hosts available on the cluster.

Returns:

the available host count.