Package org.apache.hadoop.yarn.server.nodemanager

Interface ContainerStateTransitionListener

All Superinterfaces:

org.apache.hadoop.yarn.state.StateTransitionListener<ContainerImpl,ContainerEvent,ContainerState>

All Known Implementing Classes:

NodeManager.DefaultContainerStateListener

@Public
@Evolving
public interface ContainerStateTransitionListener
extends org.apache.hadoop.yarn.state.StateTransitionListener<ContainerImpl,ContainerEvent,ContainerState>

Interface to be used by external cluster operators to implement a State Transition listener that is notified before and after a container state transition. NOTE: The pre and post transition callbacks will be made in the synchronized block as the call to the instrumented transition - Serially, in the order: preTransition, transition and postTransition. The implementor must ensure that the callbacks return in a timely manner to avoid blocking the state-machine.

Method Summary

Modifier and Type	Method	Description
void	init(Context context)	Init method which will be invoked by the Node Manager to inject the NM Context.

Methods inherited from interface org.apache.hadoop.yarn.state.StateTransitionListener

postTransition, preTransition

Method Detail

init

void init(Context context)

Init method which will be invoked by the Node Manager to inject the NM Context.

Parameters:

context - NM Context.