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

Methods

Modifier and Type	Method and Description
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.